The Race Face Direct Mount 3 Bolt Chainring is tested on the North Shore and in the Whistler Bike Park and deliver substantial weight saving compared to a standard SRAM chainring and spider combo. And with added benefit of Narrow/Wide tooth configuration.  Race Face Direct Mount 3 Bolt Chainring Features Narrow Wide tooth profiling ensures ultimate chain retention. Fits SRAM GXP cranks with the removable spider. Replaces your existing chainring and spider which is attached via 3 bolts on the back of the spider. Remove spider and simply use these same 3 bolts to re-attach the Race Face DM ring 7075-T6 aluminum, aerospace grade strength. Stiff 4mm plate thickness to transfer loads without flexing. Compatible for 9, 10 and 11 speed.