I was at the LBS yesterday where they had their annual "Bike Rep Night"...
the SRAM guy was showing their XX1 crank with the XX1 chain... well well as a system the chain stays on the crank (very difficult to pull out, but does not hinder rotation)...to prevent dropped chains.
apparently, the rep or SRAM hasn't considered it yet, for road applications... maybe to eliminate the chain keeper on the Red
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