Jersey Boy Yeah
Join Date: Oct 2006
Bikes: Trek 1000, Debernardi Track, Cervelo P2C, Specialized Tarmac Expert, Specialized Allez Comp
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Converting from square taper to Octalink
I have an older Trek 1000 that I would like to rebuild into my foul weather bike. It originally had a Bontrager triple crank with a square taper BB (English). I am looking to upgrade to the 9 speed Ultegra 6500 series double crank and BB.
The original square taper BB (UN54) had a spindle length of 113.
I was browsing through some websites and have seen two lengths - 109.5 and 118.5. Are they for double and triple cranks respectively? Did I just answer my own question?
What are the differences between the V1 and V2 versions? The V1 seems to have more sizes which leads to my confusion.