I just replaced the cranks (and bb) on a hybrid bike and the bb spindle is too short. How can I figure out the correct length so I only have to order the part once (well, once more)?
The bike is a Scott SUB 10, it has a Deore rear hub w/ disc brake and it had a mountain triple (Shimano FC-M521) with a 190mm Q-factor which is just too wide for me. I replaced it with a FSA Vero compact double and Sugino 103mm square taper bb (the crank specs 103mm).
Everything fits, shifting between rings is fine and there is clearance on the chainstays but the chainline is too far in and when I am in the small chainring and smallest three cogs the chain rubs on the large chainring.
I want to move the line out just enough to for the chain to run freely but no further as I am trying to minimize the Q.