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From Ory-gun with love: T47 BBs
https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane.
I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. |
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#2
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From Ory-gun with love: T47 BBs
On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote:
https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom.. Press fit BB are a PIA in more than one way. Lou |
#3
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From Ory-gun with love: T47 BBs
On Monday, April 13, 2020 at 4:27:24 PM UTC-4, jbeattie wrote:
https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. Thank God! Hasn't it been weeks and weeks since we've had a new bottom bracket standard? I was getting really antsy! - Frank Krygowski |
#4
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From Ory-gun with love: T47 BBs
On Monday, April 13, 2020 at 4:27:24 PM UTC-4, jbeattie wrote:
https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. Thank God! Hasn't it been weeks and weeks since we've had a new bottom bracket standard? I was getting really antsy! - Frank Krygowski |
#6
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From Ory-gun with love: T47 BBs
On Monday, April 13, 2020 at 3:56:49 PM UTC-7, John B. wrote:
On Mon, 13 Apr 2020 14:10:51 -0700 (PDT), wrote: On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote: https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom. Press fit BB are a PIA in more than one way. Lou I've always wondered about the "creaking BB"? What is creaking? It can't be the bearing cups as they are, or should be, screwed into the threaded housing and tightened; tight! If the bearings are adjusted correctly they won't creak, or at least a much smaller but similar in construction wheel bearing doesn't creak, or does it? So what's left? The BB shaft is bending? The pedal arm moving on a tapered shaft because it isn't mounted correctly? -- cheers, John B. The Phil Wood outboard on my '92 Paramount is still creak free after ??,??? commuter miles. Is it that only the ti BB's are supposed to creak? |
#7
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From Ory-gun with love: T47 BBs
On 4/13/2020 5:56 PM, John B. wrote:
On Mon, 13 Apr 2020 14:10:51 -0700 (PDT), wrote: On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote: https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom. Press fit BB are a PIA in more than one way. Lou I've always wondered about the "creaking BB"? What is creaking? It can't be the bearing cups as they are, or should be, screwed into the threaded housing and tightened; tight! If the bearings are adjusted correctly they won't creak, or at least a much smaller but similar in construction wheel bearing doesn't creak, or does it? So what's left? The BB shaft is bending? The pedal arm moving on a tapered shaft because it isn't mounted correctly? Yes, all of those things and more. Noises do plague some riders more than others. Noises often resonate, making the source hard to locate (open cam rear wheel QR disguised as 'crank noise') The description by rider can vary wildly from noises heard on test ride('Your saddle creaks.' 'No, it's a crank noise.'). You get the idea; 'noise' on a bicycle is more complex than one might at first imagine. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#8
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From Ory-gun with love: T47 BBs
On 4/13/2020 6:56 PM, John B. wrote:
On Mon, 13 Apr 2020 14:10:51 -0700 (PDT), wrote: On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote: https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom. Press fit BB are a PIA in more than one way. Lou I've always wondered about the "creaking BB"? What is creaking? It can't be the bearing cups as they are, or should be, screwed into the threaded housing and tightened; tight! If the bearings are adjusted correctly they won't creak, or at least a much smaller but similar in construction wheel bearing doesn't creak, or does it? So what's left? The BB shaft is bending? The pedal arm moving on a tapered shaft because it isn't mounted correctly? I've had two major incidences of "creaking bottom bracket" on my ancient Cannondale. One was indeed the bottom bracket (a SunTour cartridge unit) despite it being installed nice and tight. I cured it by wrapping the threads of the locating cups with teflon tape. I think the explanation is that the threads are not an interference fit. There must be some tiny clearance between the male and female (frame) threads, and even if tight, those parts can wobble under the heavy loads of hard pedaling. Aluminum bikes are known for that problem. The second "creaking bottom bracket" on that bike turned out to instead be from the saddle. I think the plastic top sometimes rubs against the saddle rail, or perhaps the rubbing is where the rails plug into the plastic top. It drove me nuts for quite a while, partly because it was so intermittent. When it returns, I try to ignore it until I get home. Then I try to remember to spray some lube in various places in the saddle. But that's difficult, because when I'm taking the bike into the house, it never squeaks to remind me! -- - Frank Krygowski |
#9
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From Ory-gun with love: T47 BBs
On Mon, 13 Apr 2020 20:36:45 -0400, Frank Krygowski
wrote: On 4/13/2020 6:56 PM, John B. wrote: On Mon, 13 Apr 2020 14:10:51 -0700 (PDT), wrote: On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote: https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom. Press fit BB are a PIA in more than one way. Lou I've always wondered about the "creaking BB"? What is creaking? It can't be the bearing cups as they are, or should be, screwed into the threaded housing and tightened; tight! If the bearings are adjusted correctly they won't creak, or at least a much smaller but similar in construction wheel bearing doesn't creak, or does it? So what's left? The BB shaft is bending? The pedal arm moving on a tapered shaft because it isn't mounted correctly? I've had two major incidences of "creaking bottom bracket" on my ancient Cannondale. One was indeed the bottom bracket (a SunTour cartridge unit) despite it being installed nice and tight. I cured it by wrapping the threads of the locating cups with teflon tape. I think the explanation is that the threads are not an interference fit. There must be some tiny clearance between the male and female (frame) threads, and even if tight, those parts can wobble under the heavy loads of hard pedaling. Aluminum bikes are known for that problem. Not to argue but a properly torqued thread shouldn't move as the longitudinal tension 'should' keep the 60 degree thread centered. Shouldn't it. Example: a three jaw chuck mounted on a 15 inch lathe doesn't move on the threads under the heaviest cutting load. Does it? The second "creaking bottom bracket" on that bike turned out to instead be from the saddle. I think the plastic top sometimes rubs against the saddle rail, or perhaps the rubbing is where the rails plug into the plastic top. It drove me nuts for quite a while, partly because it was so intermittent. When it returns, I try to ignore it until I get home. Then I try to remember to spray some lube in various places in the saddle. But that's difficult, because when I'm taking the bike into the house, it never squeaks to remind me! My Brooks saddle used to make squeaking noises AND! Back when I lived at home and we had horses a saddle would occasionally creak :-) Some neatsfoot oil used to cure that :-) -- cheers, John B. |
#10
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From Ory-gun with love: T47 BBs
On Mon, 13 Apr 2020 19:25:20 -0500, AMuzi wrote:
On 4/13/2020 5:56 PM, John B. wrote: On Mon, 13 Apr 2020 14:10:51 -0700 (PDT), wrote: On Monday, April 13, 2020 at 10:27:24 PM UTC+2, jbeattie wrote: https://www.velonews.com/gear/argona...w-threaded-bb/ There is a new article in Velo News about Trek adopting the standard for some of its bikes including the new Domane. I had threaded outboard BBs that creaked. It's not like they were perfect, and you have a double interface with the threaded body and the pressed-in bearing, so AFAIK,absolute silence is not a guaranty. But its supposed to be pretty slick. What is old is new again -- except bigger. Like tennis rackets and bike tires. And with Chris King, you know it will be affordable. -- Jay Beattie. I will take english threaded outboard BB any time. As long as replacements cost less than 20 euro https://www.bike-components.de/en/Sh...racket-p35878/ I don't need bigger bearings and don't care about creaks that happen seldom. Press fit BB are a PIA in more than one way. Lou I've always wondered about the "creaking BB"? What is creaking? It can't be the bearing cups as they are, or should be, screwed into the threaded housing and tightened; tight! If the bearings are adjusted correctly they won't creak, or at least a much smaller but similar in construction wheel bearing doesn't creak, or does it? So what's left? The BB shaft is bending? The pedal arm moving on a tapered shaft because it isn't mounted correctly? Yes, all of those things and more. Noises do plague some riders more than others. Noises often resonate, making the source hard to locate (open cam rear wheel QR disguised as 'crank noise') The description by rider can vary wildly from noises heard on test ride('Your saddle creaks.' 'No, it's a crank noise.'). You get the idea; 'noise' on a bicycle is more complex than one might at first imagine. Added to that it seems that often the user will not be using terms that the mechanic can understand. I was in the shop on a Sunday (doing a "home project") and a guy came over from the Fire Station and wanted to know if we had any of "them fat thread bolts" which kind of threw me for a bit, until he showed me a sample, a coarse thread bolt :-) -- cheers, John B. |
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