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#1
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BB standard
Standards are great! We ought to have more of them!
https://www.bikeradar.com/news/2020-...ockett-t47-bb/ If words have meaning, what is 'standard' any more? -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#2
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BB standard
On 10/06/2019 15:04, AMuzi wrote:
Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ If words have meaning, what is 'standard' any more? Standards are like tooth brushes, great idea, but you wouldn't want to use anyone else's... |
#3
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BB standard
On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote:
Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ But this one: "Launched back in 2015, the T47 BB standard was a collaboration between Chris King and Argonaut Cycles, and was designed to cure the creeks associated with PF30 BBs." Will the creeks run dry? - Frank Krygowski |
#4
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BB standard
On 6/10/2019 9:28 AM, Frank Krygowski wrote:
On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote: Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ But this one: "Launched back in 2015, the T47 BB standard was a collaboration between Chris King and Argonaut Cycles, and was designed to cure the creeks associated with PF30 BBs." Will the creeks run dry? At the end of the last century, 650B 584 was finally dead, a stake mercifully driven through its heart. But, zombielike, it returned as the rolling dead. We can only hope to drop Campagnolo carbon SuperRecord 12 cranks into our Chater-Lea frames soon! -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#5
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BB standard
On Monday, June 10, 2019 at 7:43:08 AM UTC-7, AMuzi wrote:
On 6/10/2019 9:28 AM, Frank Krygowski wrote: On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote: Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ But this one: "Launched back in 2015, the T47 BB standard was a collaboration between Chris King and Argonaut Cycles, and was designed to cure the creeks associated with PF30 BBs." Will the creeks run dry? At the end of the last century, 650B 584 was finally dead, a stake mercifully driven through its heart. But, zombielike, it returned as the rolling dead. We can only hope to drop Campagnolo carbon SuperRecord 12 cranks into our Chater-Lea frames soon! -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Don't you think that it is about time that real attention was paid to the lowly bottom bracket which was always just jammed in there like an after-thought? The narrower BB's are more efficient but the problem has been the creaking. Replacing the press-fit bearings for a screw-in is actually an intelligent idea. It reduces the weight of the BB shell because it doesn't require the rigidity of a press fit BB. |
#6
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BB standard
On Monday, June 10, 2019 at 9:54:34 AM UTC-7, Tom Kunich wrote:
On Monday, June 10, 2019 at 7:43:08 AM UTC-7, AMuzi wrote: On 6/10/2019 9:28 AM, Frank Krygowski wrote: On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote: Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ But this one: "Launched back in 2015, the T47 BB standard was a collaboration between Chris King and Argonaut Cycles, and was designed to cure the creeks associated with PF30 BBs." Will the creeks run dry? At the end of the last century, 650B 584 was finally dead, a stake mercifully driven through its heart. But, zombielike, it returned as the rolling dead. We can only hope to drop Campagnolo carbon SuperRecord 12 cranks into our Chater-Lea frames soon! -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Don't you think that it is about time that real attention was paid to the lowly bottom bracket which was always just jammed in there like an after-thought? The narrower BB's are more efficient but the problem has been the creaking. Replacing the press-fit bearings for a screw-in is actually an intelligent idea. It reduces the weight of the BB shell because it doesn't require the rigidity of a press fit BB. BBs have gotten more attention than any other frame component in the last 10-15 years. https://wheelsmfg.com/bb-standards Too much attention. They should have gotten less attention. And before we changed the shells, we had to cycle through ISIS and Octalink. I think we hit the pinnacle with Shimano $16 outboard bearings in a threaded BB with a Hollowtec crank. https://www..jensonusa.com/Shimano-B...Eg rQYdKwAN1A Or a Campy equivalent if you're into Italiano. I could see super-sizing the standard threaded format to get more real estate at the BB junction on CF frames. But if the standard died out like Chater-Lea, you'd be screwed. Maybe you could still use PF30. I don't know. The good part about the BB30 direct mount (not PF) formats is that you just have to squeeze in standard 6806 bearings, a standard that is used in other applications, and for me, they stay quiet with some Loctite 609. -- Jay Beattie. |
#7
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BB standard
On 11/6/19 1:40 pm, jbeattie wrote:
BBs have gotten more attention than any other frame component in the last 10-15 years. https://wheelsmfg.com/bb-standards Too much attention. They should have gotten less attention. And before we changed the shells, we had to cycle through ISIS and Octalink. I think we hit the pinnacle with Shimano $16 outboard bearings in a threaded BB with a Hollowtec crank. https://www.jensonusa.com/Shimano-BB...Eg rQYdKwAN1A Or a Campy equivalent if you're into Italiano. Campagnolo UltraTorque BB & crank design is *the* pinnacle of development as far as I am concerned. If there was never another BB assy, I would be happy to use the UT design ad infinitum. -- JS |
#8
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BB standard
On Monday, June 10, 2019 at 8:41:00 PM UTC-7, jbeattie wrote:
On Monday, June 10, 2019 at 9:54:34 AM UTC-7, Tom Kunich wrote: On Monday, June 10, 2019 at 7:43:08 AM UTC-7, AMuzi wrote: On 6/10/2019 9:28 AM, Frank Krygowski wrote: On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote: Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ But this one: "Launched back in 2015, the T47 BB standard was a collaboration between Chris King and Argonaut Cycles, and was designed to cure the creeks associated with PF30 BBs." Will the creeks run dry? At the end of the last century, 650B 584 was finally dead, a stake mercifully driven through its heart. But, zombielike, it returned as the rolling dead. We can only hope to drop Campagnolo carbon SuperRecord 12 cranks into our Chater-Lea frames soon! -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Don't you think that it is about time that real attention was paid to the lowly bottom bracket which was always just jammed in there like an after-thought? The narrower BB's are more efficient but the problem has been the creaking. Replacing the press-fit bearings for a screw-in is actually an intelligent idea. It reduces the weight of the BB shell because it doesn't require the rigidity of a press fit BB. BBs have gotten more attention than any other frame component in the last 10-15 years. https://wheelsmfg.com/bb-standards Too much attention. They should have gotten less attention. And before we changed the shells, we had to cycle through ISIS and Octalink. I think we hit the pinnacle with Shimano $16 outboard bearings in a threaded BB with a Hollowtec crank. https://www.jensonusa.com/Shimano-BB...Eg rQYdKwAN1A Or a Campy equivalent if you're into Italiano. I could see super-sizing the standard threaded format to get more real estate at the BB junction on CF frames. But if the standard died out like Chater-Lea, you'd be screwed. Maybe you could still use PF30. I don't know. The good part about the BB30 direct mount (not PF) formats is that you just have to squeeze in standard 6806 bearings, a standard that is used in other applications, and for me, they stay quiet with some Loctite 609. -- Jay Beattie. I wouldn't be against a BB of just sealed bearings except for the reports of these causing the housing to wear and the bearings to pull out with the removal of the cranks. |
#9
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BB standard
On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote:
Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ Exactly. A quote from the comments: "Yep, 9 hours for the job, and 5 years taken off your life span. This is probably the hardest clutch job I have had the displeasure of doing." I've rebuilt VW Beetle and bus engines. You can drop one of those out of the back in about an hour, and then you're looking directly at the clutch. The Vibe is different. - Frank Krygowski |
#10
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BB standard
On Monday, June 10, 2019 at 9:04:29 AM UTC-4, AMuzi wrote:
Standards are great! We ought to have more of them! https://www.bikeradar.com/news/2020-...ockett-t47-bb/ If words have meaning, what is 'standard' any more? -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Back to bicycles and bottom bracket standards. Are the old Suntour Cyclone bottom brackets and the old Shimano bottom brackets the same standard? Can a Shimano cup and cone bottom bracket be used with a Suntour Cyclone crank? Can a Shimano cartridge bottom bracket be used with a Suntour Cyclone bottom bracket? Cheers |
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