availability of the 9 spd around here seems to suck. Can I use a Turbine 10 spd middle?
Lead by my Lefty............... right down the trail, no brakes.
I'm using a turbine 10sp granny and middle (plus bash) in place of my former 3x9 rings to make my current 2x9 system. Works great (9 speed chain, 9 speed cassette). Not sure if you can mix 9sp and 10sp rings though.