Installing HollowTech II Bottom Brackets

Please excuse the dirt nd filth on the parts in this discussion. I was in a ghetto mood, but the result of the work was clean enough for great results.

Measuring the bottom bracket shows that it is well made and will install perfectly for a bottom bracket shell width of just over 68mm with 2x 2.5mm shims.


The two shims. They will be mounted on each side of the bottom bracket shell to space the pedals evenly and attain the final chain line, 50mm.

A 1mm shim needed to be installed on the drive side to correct for the short bottom bracket shell.