CeramicSpeed's gravel-specific OSPW X system for SRAM's 13-speed AXS XPLR E1 comes equipped with 14-tooth and 20-tooth Alpha Disc Pulley Wheels. Their composite teeth material offers prolonged wear protection and noise reduction - while the solid aluminum discs eliminate the potential of external objects getting stuck. Nestled in the Alpha Disc pulleys is their patent-pending Active Debris Remover (ADR) bearing protective tech feature. ADR combines a stainless-steel dust cover and a surrounding bladed groove structure that pushes contaminants away from the bearing when rotating. The pinnacle of efficiency and protection when paired with their hand-built hybrid ceramic bearings. The new OSPW X for SRAM RED, Force, and Rival XPLR AXS comes with a reinforced molded carbon fiber cage to achieve strength, durability, and minimal weight.Injection Molded Carbon Fiber reinforced PA cage offers new levels of strength and durabilityAlpha disc pulleys are paired with a composite, narrow-wide tooth profile to help prevent debris from external objects getting stuck between the spokesThe 14-tooth upper and 20-tooth lower Alpha pulley wheels feature ADR (Active Debris Remover) bearing protection that completely encloses the bearingsGrade 3 Silicon Nitride ball bearings are 400% smoother, 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry2 customizable spring tension settings for optimal setupCompatible with SRAM RED, Force, and Rival XPLR AXS 13-speed E1 rear derailleursItem SpecificationsDrivetrain Speeds13Fits BrandSRAMFits ModelForce XPLR E1Fits ModelRED XPLR E1Fits ModelRival XPLR E1Largest Cog46 CeramicSpeed OSPW X Alpha Pulley Wheel System for SRAM RED/Force/Rival XPLR E1 Cage Assembly EAN: 5711050139415