Im looking to upgrade my cranks to an XT 10 speed 40/28 double. At the moment ive got an old XT crank with TA chinook 40/28 rings and running a standard 9 speed setup with the lower shift range limited on the front.
With there be any problems using a 9 speed front shifter with a 10 speed crank? i.e. is there any differecne in the chainring spacing on a 10 speed double compared to a DIY double or is the 10 speed double rings just the same as the two outer rings on a standard tripple crankset?!

