I have a 2x10 Raceface Turbine crank on a Tomac Flint 29r hardtail, with an x9 rear and XT front. My problem is the chain won't stay on the big ring. It shifts fine and is adjusted right. Just about every time I get off the bike in a really nasty section of trail I can't ride the dam chain comes off the big ring. I think a bashring would stop it for doing that. But I can't find one that fits that crankset.
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