MRP 1x CS Upper Chain DeviceThe 1x CS from MRP is the result of 20+ years of chainguide experience with the help of design cues from the V3 series. This model shows off a robust and light glass-filled composite backplate alongside a durable nylon upper guide which adds major security to your 1x10, 11 or 12-Speed drivetrain for out of this world quality and performance.Features:  Adds security to  "narrow/wide" 1x10/11/12 and XX1/X01 drivetrains  28-34t range (oval compatible up to 32t)  Boost compatible  Glass-filled Composite backplate  Two-bolt ISCG-05 mount backplate  No crank or chainring removal required for installation  Weight: 33gBuy MRP Components from Chain Reaction Cycles, the World's Largest Online Bike Store.