Bottom Bracket help...
 

So here is my plan, but I need help to make sure I do it correctly.

Move my 170 Ofmega cranks from my 1984 Torpado onto my 1981 Bianchi Limited (commuter).

Replace the Ofmegas with some new (to me) VO 175 cranks. (These I know are JIS)

My question is this...do I move the bottom bracket from the Torpado to the Bianchi along with the cranks? Then replace the BB on the Torpado with a new on? Say like a UN55 (is it JIS?)

Or do I even bother moving/changing BB and just move the cranks? Or something else?

I would move the BB, provided the threading is the same. Get the appropriate BB for the VO cranks for the Torpado.

Ofmega cranks often had a unique taper of their own, check out Sheldon Browns page. I agree with pars is the Ofmega BB fits move it with the cranks to the Bianchi.

What is wrong with the cranks on the Bianchi?

That's what I thought I remembered reading somewhere. I will try.


Nothing. The Bianchi became my commuter when my other got stolen...so the cranks on it are just bland. The Ofmegas are just SO much better looking. :-).

As long as the threading and BB shell widths are the same, move everything together. It'll save an awful lot of bother.