The SRAM Force eTap AXS rear derailleur is designed for both 1x and 2x systems. It capitalizes on X-Range gearing technology for enhanced range and chain management, and features larger pulleys for improved durability and efficiency.Compatible with 10-26, 10-28, and 10-33 cassettesOrbit chain management technology keeps the drivetrain quiet and secureSRAM AXS enabled, allowing easy personalizationLarger X-SYNC pulleys offer increased durability and efficiencyA single rear derailleur for all gearing combinations, including 1x and 2xBattery sold separatelyItem SpecificationsCage LengthShortChain Wrap Capacity (teeth)36ColorGloss CarbonDrivetrain Speeds12Largest Cog33Rear Der/Shifter CompatibilitySRAM eTap AXSRear Derailleur Mount Type10x1 Standard