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Bottom Bracket 9,10 speed difference?

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Bottom Bracket 9,10 speed difference?

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Old 07-08-08 | 08:29 AM
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brianmr1
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Bottom Bracket 9,10 speed difference?
I have a trek 1500 9 speed and I was thinking of changing the bottom bracket. Is there a difference between a 9 speed or 10 speed bottom bracket?
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Old 07-08-08 | 10:07 AM
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demoncyclist
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Bikes: 2011 Lynskey Sportive, 1988 Cannondale SM400

WHy do you want to change the BB? Is it shot?
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Old 07-08-08 | 10:09 AM
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ultraman6970
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Old 07-08-08 | 01:26 PM
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HillRider
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Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Originally Posted by brianmr1
I have a trek 1500 9 speed and I was thinking of changing the bottom bracket. Is there a difference between a 9 speed or 10 speed bottom bracket?
Assuming the crank/bb are Shimano, the 9-speed is probably an Octalink and the 10-speeds would be a HollowTech II external-bearing type. They are completely different.
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