Bottom Bracket: Shimano or something else?
07-20-10 | 05:05 PM
#1
Thread Starter
Alfredo Contador
Joined: Jan 2010
Posts: 431
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From: Where everybody knows my name
Bottom Bracket: Shimano or something else?
I'm thinking to convert my triple to a double and am looking for a BB to go along as well. Current BB is a square taper one. Coupla questions:
- Does it matter what sort of external BB when it comes to triple to double?
- Does Shimano still use Octalink or are they external BB as well? What about ISIS?
- How do I determine the size of the BB that I need?
- What do you think of the Truvative GXP BB vs. a Shimano Tiagra BB?
- Italian vs English? What does that mean?
thanks.
- Does it matter what sort of external BB when it comes to triple to double?
- Does Shimano still use Octalink or are they external BB as well? What about ISIS?
- How do I determine the size of the BB that I need?
- What do you think of the Truvative GXP BB vs. a Shimano Tiagra BB?
- Italian vs English? What does that mean?
thanks.
07-20-10 | 05:15 PM
#2
17yrold in 64yrold body
Joined: May 2010
Posts: 922
Likes: 1
From: Northern CA
Most square taper BB's will work with square taper cranks. I did hear of a Mavic crank splitting when installed on a shimano BB, but do not know this as fact. Octalink was in between square taper and external BB's (Shimano). Isis is different from Octalink, and not compatible. Some external BB's play nice together, others do not. If you buy an external BB crankset, it should come with the appropriate BB. English thread is what many Japanese and American bikes have as standard. Italian and French are different, and not compatible.
07-20-10 | 05:28 PM
#3
Bianchi Goddess
Joined: Apr 2009
Posts: 28,962
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From: Shady Pines Retirement Fort Wayne, In
Bikes: Too many to list here check my signature.
more than likely you need an English BB. however thetype and length of the SPINDLE is determined by the model of crank you are using. switching from a triple to a double crank you likely need a shorter spindle.
if you are unfamiliar with mechanics and changing BBs buy the one that matches your new double crank.
if you are unfamiliar with mechanics and changing BBs buy the one that matches your new double crank.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
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