Back to the future
06-15-21, 11:09 AM
#1
smelling the roses
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Back to the future
I've ready to move away from cup and cone bbs and make the leap into the cartridge type, at least on this particular bike.
How do I decide what length to get? The spindle that's on it is too long, almost certainly, at 119mm. Something I grabbed out of the parts bin. The crank set is Shimano FC 1050, double, and the bike is a '79 Trek 930.
TIA
How do I decide what length to get? The spindle that's on it is too long, almost certainly, at 119mm. Something I grabbed out of the parts bin. The crank set is Shimano FC 1050, double, and the bike is a '79 Trek 930.
TIA
06-15-21, 11:22 AM
#2
www.theheadbadge.com
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I've ready to move away from cup and cone bbs and make the leap into the cartridge type, at least on this particular bike.
How do I decide what length to get? The spindle that's on it is too long, almost certainly, at 119mm. Something I grabbed out of the parts bin. The crank set is Shimano FC 1050, double, and the bike is a '79 Trek 930.
TIA
How do I decide what length to get? The spindle that's on it is too long, almost certainly, at 119mm. Something I grabbed out of the parts bin. The crank set is Shimano FC 1050, double, and the bike is a '79 Trek 930.
TIA
-Kurt
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06-15-21, 11:39 AM
#3
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According to velobase, you should use 113mm if the Trek has an English BB-shell, or 115mm if it´s Italian. I´m using 115mm symmetrical with 6400 (The are specied to use the same length of bb) cranks on both my Olmo and my Fondriest, and thats a perfect fit on both.
06-15-21, 03:38 PM
#4
smelling the roses
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06-15-21, 04:01 PM
#5
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Correct. Different cranks require different bb´s. You could no dubt find a crankset that will fit the Rivendell bb. But why would you want to do that?. If the 105 cranks you have now are in good condition, and the chainwheels are not worn out, then it´s a perfectly fine crankset. I´m convinced that you can find a suitable bb for the same amount or less, than what the Rivendell bb + a different crankset will cost.
