Sram x0 10 speed chain rings am guardsram are passionate about cycling loved by riders who live and breathe bicycles to real cycling enthusiasts there is nothing more gratifying then achieving the ultimate ride the best part is sram just keep making it better featuresall new light weight carbon crank that is strong enough to handle the epic all mountain adventurex glide 2x10 shifting technology 26 39 28 42 and 22 33 44 gearingnew 36 22 and 38 24 chainring optionscnc machined 7mm al rin