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Damn BB Problems



 
 
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  #11  
Old December 5th 19, 09:35 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,157
Default Damn BB Problems

On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.


First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


This is a Conquest. It has an oversize (73 mm) BB shell and a 32.4mm seat tube. I've measured these several times with a digital caliper (General UltraTech) in case Jay was correct.
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  #12  
Old December 5th 19, 10:29 PM posted to rec.bicycles.tech
JBeattie
external usenet poster
 
Posts: 4,382
Default Damn BB Problems

On Thursday, December 5, 2019 at 12:35:29 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


This is a Conquest. It has an oversize (73 mm) BB shell and a 32.4mm seat tube. I've measured these several times with a digital caliper (General UltraTech) in case Jay was correct.


You must have an odd-ball product. The standard Conquest disc comes with a 68mm BB. I could not find a Conquest with a 73mm BB. BTW, you could always go with an old MTB square drive BB and put a road crank on it, assuming it is actually 73mm.

https://www.texascyclesport.com/redl...ycle-in-store/ https://www.bicyclebluebook.com/valu...product/10508/

-- Jay Beattie.
  #13  
Old December 5th 19, 10:57 PM posted to rec.bicycles.tech
AMuzi
external usenet poster
 
Posts: 10,977
Default Damn BB Problems

On 12/5/2019 1:07 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.


It's a riddle wrapped in a mystery inside a sesame seed bun. I think TK has a very unique bike or needs a new set of calipers.

-- Jay Beattie.


Maybe it's not a Redline.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


  #14  
Old December 5th 19, 11:52 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,157
Default Damn BB Problems

On Thursday, December 5, 2019 at 1:57:17 PM UTC-8, AMuzi wrote:
On 12/5/2019 1:07 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.


It's a riddle wrapped in a mystery inside a sesame seed bun. I think TK has a very unique bike or needs a new set of calipers.

-- Jay Beattie.


Maybe it's not a Redline.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


Yeah, it must be a brown circle.
  #15  
Old December 5th 19, 11:57 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,157
Default Damn BB Problems

On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?


BTW for anyone that is interested - the 24 mm shaft isn't as stiff as the 30 mm one but the BEARINGS are a lot better.

The FSA MegaExo has changed their shaft from 24 mm to 19 mm for who the hell knows why? Maybe that allowed them to use a standard instead of a custom bearing.

Shimano hasn't responded to me about whether their road groups will fit an oversize BB shell.
  #16  
Old December 6th 19, 12:29 AM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,157
Default Damn BB Problems

On Thursday, December 5, 2019 at 1:29:33 PM UTC-8, jbeattie wrote:
On Thursday, December 5, 2019 at 12:35:29 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800"..

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


This is a Conquest. It has an oversize (73 mm) BB shell and a 32.4mm seat tube. I've measured these several times with a digital caliper (General UltraTech) in case Jay was correct.


You must have an odd-ball product. The standard Conquest disc comes with a 68mm BB. I could not find a Conquest with a 73mm BB. BTW, you could always go with an old MTB square drive BB and put a road crank on it, assuming it is actually 73mm.

https://www.texascyclesport.com/redl...ycle-in-store/ https://www.bicyclebluebook.com/valu...product/10508/

-- Jay Beattie.


Believe it or not I generally give you the benefit of a doubt. When I measured the bottom bracket yesterday I measure it across the bottom of the shell and I must have caught a spacer or something. Today with the large fluorescent light on and measuring it over the Chainstays I get 68. Mine is like the "bluebook" version though it is black and yellow.

The front derailleur MEASURES 31.8 mm but the adapters I have (3) DO NOT go on to the tubing. Measuring again, the damn tubing actually changed its diameter as it rises away from the BB where it is 32 mm. But I just ordered a 34.9 and the plastic adapter which is just like front derailleur that works. I do have an FSA Gossamer crank and will have to order new BB cups since this one came off of the Basso and so it is Italian cups.

This guy Hambini who is on youTube is one hell of an engineer and he doesn't like the non-standard ball bearings and recommends 24 mm shafts to get a standard sealed bearing to work.
  #17  
Old December 6th 19, 05:12 AM posted to rec.bicycles.tech
JBeattie
external usenet poster
 
Posts: 4,382
Default Damn BB Problems

On Thursday, December 5, 2019 at 3:29:41 PM UTC-8, Tom Kunich wrote:
On Thursday, December 5, 2019 at 1:29:33 PM UTC-8, jbeattie wrote:
On Thursday, December 5, 2019 at 12:35:29 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

This is a Conquest. It has an oversize (73 mm) BB shell and a 32.4mm seat tube. I've measured these several times with a digital caliper (General UltraTech) in case Jay was correct.


You must have an odd-ball product. The standard Conquest disc comes with a 68mm BB. I could not find a Conquest with a 73mm BB. BTW, you could always go with an old MTB square drive BB and put a road crank on it, assuming it is actually 73mm.

https://www.texascyclesport.com/redl...ycle-in-store/ https://www.bicyclebluebook.com/valu...product/10508/

-- Jay Beattie.


Believe it or not I generally give you the benefit of a doubt. When I measured the bottom bracket yesterday I measure it across the bottom of the shell and I must have caught a spacer or something. Today with the large fluorescent light on and measuring it over the Chainstays I get 68. Mine is like the "bluebook" version though it is black and yellow.


Remove the cups; pull out the spacers, reinstall the cups and throw in a 105. Gossamers are cheap cranks, and you're tied to FSA's 24.07 format BBs. You can beat one of those cranks into a Shimano 24mm BB, but why bother. My LBS has 172.5s pretty dang cheap. https://tinyurl.com/wwagwp3 I got a 105 for $90 from PBK before Shimano cut them off. You could even go with a Sora or Tiagra. This is just a beater bike for your friend.

-- Jay Beattie.


  #18  
Old December 6th 19, 10:48 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,157
Default Damn BB Problems

On Thursday, December 5, 2019 at 8:12:19 PM UTC-8, jbeattie wrote:
On Thursday, December 5, 2019 at 3:29:41 PM UTC-8, Tom Kunich wrote:
On Thursday, December 5, 2019 at 1:29:33 PM UTC-8, jbeattie wrote:
On Thursday, December 5, 2019 at 12:35:29 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 6:19:42 PM UTC-8, AMuzi wrote:
On 12/4/2019 7:37 PM, jbeattie wrote:
On Wednesday, December 4, 2019 at 2:45:37 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 1:46:14 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 1:13:06 PM UTC-8, Tom Kunich wrote:
On Wednesday, December 4, 2019 at 12:29:34 PM UTC-8, jbeattie wrote:
On Wednesday, December 4, 2019 at 9:32:13 AM UTC-8, Tom Kunich wrote:
On Tuesday, December 3, 2019 at 8:30:26 PM UTC-8, jbeattie wrote:
On Tuesday, December 3, 2019 at 4:27:50 PM UTC-8, Tom Kunich wrote:
I have a Redline cross bike and it had an XT crank on it that had a 24-38 rings. The bottom bracket appears to be an XT also but the only thing on it was "mountain" on both sides and the markings are "BB-MT800".

I pulled off the cranks and tried to replace them with a Reynolds 24 mm shaft compact chainset I tripped across while I was looking in my parts bin(s)

When I inserted it, I discovered that the end cap of the Reynolds crank was missing. Also it appears that the crank is about a 1/4th inch too short for that bottom bracket.

Tearing the universe apart I still haven't found the endcap which is smaller thread than the XT crank.`

So I need to figure out what BB the Reynolds is supposed to use. The Reynolds site was no help. Plus I can't find out what the size and thread of the endcap is and they make enough 2nd manufacturer end caps that they probably make one that will fit for $5-6.

Anyone got any information on these things?

Oh Gawd, so all that wasted time on BB386. It is a f****** threaded BB. I was right.

Go buy a 105 crank and put the Reynolds crank back in the parts box or on eBay. Done.

-- Jay Beattie.

Are you saying that BB-MT800 or whatever it is is a BB386? I'm not convinced they are. There isn't a lot width diffeence.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. BB386 is a press-fit format not a threaded cup. You have a plain old regular (probably) 68mm ISO threaded BB shell. The same thing as half the road bikes on the planet. You took a Shimano out, put a Shimano back. This is a two minute process.. Just confirm that it is a 68mm BB and not a 73mm, which would be really odd for a CX bike.

-- Jay Beattie.

https://www.bing.com/images/search?v...vt=0&eim=1,2,6

Groan. That is a CONVERSION BB for using BB386 crank on an ISO/BSA threaded BB frame. A standard BB386 BB is a press-fit format for 46mm bore BB shell. https://www.youtube.com/watch?v=U66bVfZeLyk

Don't be opaque. Answer the following two, simple questions:

1. What is the width of the BB shell?
2. Is the shell threaded?

If you have a 68mm threaded BB shell and a BB-MT800 (NOT PF) BB, then throw in a Shimano road crank and stop this insanity. If it is 73mm, use a Shimano mountain crank -- like the one you took out. This should take five or ten minutes tops and not days of bizarre speculation.


-- Jay Beattie.

It is threaded and a 73 mm width. I am not about to put an MTB crank into a cross frame. Shimano makes an "oversize" BB and so they must let a normal crank work.

First, are you sure that there are not a bunch of spacers between the BB cup and the face of the BB shell, which you need when using a MTB crank on a 68mm shell. Are you sure that you are not measuring a bunch of spacers? I ask because I could not find any indication that Redline ever made a Conquest with a 73mm bottom bracket shell. Are you sure it is a Redline -- or is it some Chinese knock-off like a Redlime or a Reedline?

If it really is 73mm, you're screwed if you don't want to use a mountain crank. Maybe Andrew can help you.

-- Jay Beattie.


I read the original post and saw the whole thing as an
obscured sort of tarbaby. Or maybe more charitably an
unresolvable koan.

Redline Cross frame BBs are 1.370"x24t threaded BSC and 68mm
wide. Redline Cross frames are 34.8 FD in aluminum and titanium.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

This is a Conquest. It has an oversize (73 mm) BB shell and a 32.4mm seat tube. I've measured these several times with a digital caliper (General UltraTech) in case Jay was correct.

You must have an odd-ball product. The standard Conquest disc comes with a 68mm BB. I could not find a Conquest with a 73mm BB. BTW, you could always go with an old MTB square drive BB and put a road crank on it, assuming it is actually 73mm.

https://www.texascyclesport.com/redl...ycle-in-store/ https://www.bicyclebluebook.com/valu...product/10508/

-- Jay Beattie.


Believe it or not I generally give you the benefit of a doubt. When I measured the bottom bracket yesterday I measure it across the bottom of the shell and I must have caught a spacer or something. Today with the large fluorescent light on and measuring it over the Chainstays I get 68. Mine is like the "bluebook" version though it is black and yellow.


Remove the cups; pull out the spacers, reinstall the cups and throw in a 105. Gossamers are cheap cranks, and you're tied to FSA's 24.07 format BBs.. You can beat one of those cranks into a Shimano 24mm BB, but why bother. My LBS has 172.5s pretty dang cheap. https://tinyurl.com/wwagwp3 I got a 105 for $90 from PBK before Shimano cut them off. You could even go with a Sora or Tiagra. This is just a beater bike for your friend.

-- Jay Beattie.


Since the local Craigslist has Ultegra cranks on it fairly often I'll wait for one of those to come along. Right now they all have those blankety blank power meter sections on them.

As I pointed out, my Gossamer cranks are MegaEVO (30 mm shaft) So I would have had to get a new set of cups for that. But if the Ultegra will be wide enough and everything else will be Ultegra that sounds a better way to go.

Looking at the left BB cup it does appear to have a 3 or 4 mm spacer in it. I can't tell in the light in my garage is there's any on the right side. The rain hasn't arrived yet and was due a couple of hours ago.

I just got back from the DMV after putting in for a Real ID - totalitarianism at work. We're here from the government and we're going to help you by recording any and every move you make.

I also got a set of Disabled plates since I keep forgetting to put that plaque up and have cops yelling at me. So the disabled license plate will fix that. And since I've been stopped now, three times, for suspicious activity - driving the speed limit - that should stop that as well. And since there's no way I can pass he old-fashion drunk test which tests your balance they now have permission to give me an electronic alcohol test.
 




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