Help me understand bottom brackets

Hovis Brown [quote]ffub Okay I'm kind of baffled by the whole matching up bottom brackets to cranks. I'm thinking of getting the Stronglights Roberto is selling for a pub bike. What bottom bracket am I after? Square tapered I gather but for a 42mm chainline do I want 103mm, 107mm?

"Compatible with JIS Taper bottom bracket with 107mm e.g. JP400 or JPSPB"

from the ribble site.[/quote]
Not so fast my wholemeal friend.

Check the Hubjub blog ici:

http://www.hubjub.co.uk/blog/5oct.htm