I am about to upgrade my CX bike from the old 105-5700 (10spd) to Rival 22 (11spd). I have all the parts already and while reading the crankset/BB (GXP) manual I noticed the following:
Use the provided spacers with wide axle cranksets on 135 mm OLD rear triangle frames.
My frame does have 135mm OLD (and 68mm english bottom bracket).
As far as I understand, the Rival crankset is a road component designed for the standard 130mm road bike rear spacing and 68mm BB but in my case the bike has 135mm spacing.
How does this affect me? Can I use the spacers with my 68mm bracket (GXP has two 2.5mm spacers but I assume they won't fit because they are for 73mm BB AND/OR the crankset won't accomodate them)? Should I even worry about this (it's just 2.5mm on one side and the chain is flexible anyways)?