Originally Posted by
hockeyteeth
GXP bottom brackets have no reliable, simple adjustability on the bearing preload, which honestly kinda sucks. If the BB is a bit loose upon initial installation and torquing to ~40nm you can apply additional torque to a max value of 48-54nm to eliminate play by removing crankset, regreasing spindle, and tightening again. It's a lame design. Assuming you match BB shell width, BB, and crankset compatibility then you should be fine.
I don't have a torque wrench, and installed the BB with a park bbt-9. Initially I thought I may have tightened the external bearings too tight, so I took the crank off and reinstalled everything. I can't say exactly how much force I used to tighten it, but it seems ok. There is no play in the crank arms.
Slight of using a torque wrench, is there any other way to ensure the BB is installed correctly? It's definitely an english bb, and the crank comes with the GXP, so hopefully it's fine.