Originally Posted by
bobonker
Oh BTW -- On the original Shimano setup, there was a thin (~1mm) spacer between the drive side bottom bracket cup and the frame. When I put the SRAM bottom bracket in, I initially left the spacer out because I thought it was specific to the Shimano BB. Without the spacer, there was play in the crank even though it was fully tightened. When I put the spacer back in, the play was gone, so I assembled it with the spacer.
The SRAM bottom bracket came with a pair of 2.5mm spacers, but it looked like those were for MTB use.
Bob
gxp bbs use the non drive side to index the chain line. play in comes from the left crank arm not bottoming out and capturing the non drive bearing. sram also had a run on gxp bbs that were out of spec, no amount of removing/regrease/retorque got rid of the play. something to look into