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- 7075-T6 aluminum direct mount ring for SRAM GXP cranks with a removable spider\n- Fits XX1, XO1, XO, X9, X7, S2210, S1400, and Truvativ AKA (GXP) \n- Narrow-wide teeth prevent chain drop, updated tooth profile runs quieter \n- Compatible with 9-12 speed chains, allowing a 1X set up on most any drivetrain