This derailleur is part of the SRAM S100 Eagle Drivetrain range, which replaces the SX and NX Eagle 12 speed range. The S100 range is backward compatible with SX and NX Eagle. Built on a decade of Eagle drivetrain development, the SRAM Eagle S100 rear derailleur delivers reliable shifting performance with updated durability and improved component fitment. The modernised design features an enhanced bushing fitment process to maintain precise operation over long-term use, even under demanding riding conditions. Available with a standard mounting bolt or the innovative Half Mount configuration for UDH-equipped bikes, the derailleur provides improved hanger stability and a cleaner integration similar to Transmission systems. Designed for high-torque applications and consistent shifting performance, the Eagle S100 continues the Eagle promise of accurate, dependable gear changes across varied terrain. FeaturesUpdated design built on ten years of Eagle drivetrain development Half Mount option improves derailleur hanger stability on UDH frames Half Mount interface helps protect the hanger from impacts and knocks Proven Drag Spring cage damper for secure chain retention Compatible with Eagle shifters using X-Actuation technology Designed to work with wide-range 10-50T Eagle cassettes Specifications Speed compatibility: 12-speedDrivetrain configuration: 1xCable pull ratio: X-ActuationShift technology: X-ActuationCage type: Long cageMaximum cassette size: 50TPulley bearing material: SteelCage material: SteelMinimum cassette compatibility: 50T This derailleur is part of the SRAM S100 Eagle Drivetrain range, which replaces the SX and NX Eagle 12 speed range. The S100 range is backward compatible with SX and NX Eagle. Built on a decade of Eagle drivetrain development, the SRAM Eagle S100 rear derailleur delivers reliable shifting performance with updated durability and improved component fitment. The modernised design features an enhanced bushing fitment process to maintain precise operation over long-term use, even under demanding riding conditions. Available with a standard mounting bolt or the innovative Half Mount configuration for UDH-equipped bikes, the derailleur provides improved hanger stability and a cleaner integration similar to Transmission systems. Designed for high-torque applications and consistent shifting performance, the Eagle S100 continues the Eagle promise of accurate, dependable gear changes across varied terrain. FeaturesUpdated design built on ten years of Eagle drivetrain development Half Mount option improves derailleur hanger stability on UDH frames Half Mount interface helps protect the hanger from impacts and knocks Proven Drag Spring cage damper for secure chain retention Compatible with Eagle shifters using X-Actuation technology Designed to work with wide-range 10-50T Eagle cassettes Specifications Speed compatibility: 12-speedDrivetrain configuration: 1xCable pull ratio: X-ActuationShift technology: X-ActuationCage type: Long cageMaximum cassette size: 50TPulley bearing material: SteelCage material: SteelMinimum cassette compatibility: 50T SRAM Product ID: RD-S100-B1