SRAM X1 1000 BB30 32T 11 Speed Crankset. Embrace the 1x drivetrain revolution with the SRAM X1 1000 BB30 11 speed crankset. Ideal for all mountain, trail and XC riding, the X1 crank features X Sync chainring technology for flawless single chainring performance. The included 32T chainring features tall, square teeth, rounded chamfers, and a thick thin tooth geometry to engage the chain earlier and never let it go. Additionally, recesses at the base of the teeth get rid of mud so the chain remains in place no matter what conditions you're up against. The chainring is CNC machined 7075 aluminum for strength and durability without any weight penalty. The crankarms are forged 6000 series aluminum and the spider is forged aluminum for stiffness, strength, and optimal power transfer in demanding, off road conditions.