I've been playing with a few different gearing systems for a loaded touring bike - a Salsa Vaya with a Titec J-bar using XT dual control levers with a 12x36 9-speed cassette.
After trying a compact road crank, and a mt. crank converted to a double (26/40) I've settled on a double with a 28/42 and I just ordered a new Sram X.7 crankset (S1400) with the 28/42 rings.
My question is - are the rings on the new SRAM cranksets designed to work only with 10-speed chains or will I be able to use a 9-speed chain for the 9-speed cassette? I know that the road 10-speed cranks I've used (SRAM Rival) had no problems with a 9-speed chain so I assumed (perhaps a mistake...) that the 10-speed mtb rings would be fine with a 9-speed chain.
Also, have there been any reviews on these cranksets yet? Bang for buck they seem like a great way to go.
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