This system for SRAM Eagle AXS derailleurs features a narrow-wide profile to ensure durable chain retention. The 14-tooth upper and 18-tooth lower pulleys reduce chain drag while the carbon fiber pulley cage ensures durability and light weight. Compatible with: SRAM Eagle XX1 AXS, SRAM Eagle GX AXS and SRAM Eagle XO1 AXS Derailleurs.This product includes: Oversized Pulley Wheel System, CeramicSpeed Bearing Oil, (15ml. bottle).Coated products make less friction than standard finish, and are ultra-resistant to corrosion from degreaser, water, or mud.