Originally Posted by
bh85
So I got my frame from powder coating. I have been working on it today and I’m having an issue with SRAM Apex 10 speed 50/34 crankset. Big chainring is hitting the chain stay. Is 92 frame incompatible with 50 chainring? Can I use spacers or do I have to go down to smaller chainring or maybe run 1x10?
It seems like you ran into a chainline issue (road double [43.5mm] vs MTB triple [47.5mm]). Basically, your 50t is roughly where your middle ring is now.
These modern road cranksets from Shimano, SRAM, and Campagnolo are not meant to run shims on the BB, there is no chainline adjustment. GXP especially uses a stepped down spindle which requires a specific distance for preload; unless the shell is way out of spec, BB shims are not used on road cranks.
It looks like a Shimano Hollowtech II 50/34 fits.