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#1
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Damn BB Problems
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? |
#2
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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? 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. |
#3
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Damn BB Problems
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. |
#4
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Damn BB Problems
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. |
#5
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Damn BB Problems
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 |
#6
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Damn BB Problems
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. |
#7
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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. |
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