Originally Posted by
jackss731
Im already running a 10 spd crankset...would it make sense to pick up a 10 speed chain? or is what I said just BS haha
Optimal Mixed Drivetrain Configuration:
10-speed: crankset, chain, front derailleur
with...
9-speed: cassette, rear derailluer, shifters(F/R)
This is what I'm currently running, on my Cannondale Bad Boy....and it all shifts
instantly, like butter:

SRAM X0 9-speed rear derailleur, with SRAM PC-1091R 10-speed chain and Shimano XTR 11-34 9-speed cassette(Dura Ace 7700 equivalent)

FSA Energy 46-36 Cyclocross 10-speed crankset, with FSA Energy 10-speed double front derailluer

SRAM X0 9-speed gripshifters
OP - go with a 10-speed chain(KMC X10SL or SRAM PC-1091R).....problem SOLVED!