Bottom Bracket spindle length ?
I am looking to replace a 175mm triple crank on a 1985 Ritchey with a new 170mm crank. The original Shimano triple crank was on a bottom bracket with a 121.5mm spindle. A 124mm spindle is recommended for the new crank that I’m looking at. Will the 121.5mm spindle work (2.5mm difference), or should I put in a new BB?