The Eagle AXS derailleur is the heart of the drivetrain. Providing complete control with confident shifts the proven wireless system brings World Championship winning pedigree to any bike. AXS connectivity makes for easy wireless setup as well as customization and integration with any other AXS component. The S500 Eagle AXS derailleur is smart enough to protect itself thanks to its incredibly resilient Overload Clutch. In the event of an impact the motor gearbox disengages giving the derailleur freedom to move and instantly returns to its position for a seamless experience for the rider. The system is water and dust-proof for confidence in creek crossings mud splattering and the resulting post-ride washings. Engineered with a variety of rider preferences in mind it is compatible with both 10-52t and 10-50t Eagle cassettes. Utilizes Type 3 cage damper for confident chain retention and quiet descending Robust aluminum cage Eagle Drivetrain Ecosystem compatible AXS enabled for easy wireless setup personalization reliability and compatibility across SRAM MTB or Road AXS components Compatible with Eagle drivetrain 50t or 52t cassettes In the event of an impact the Overload Clutch disengages the motor gearbox giving the derailleur freedom to move and instantly returns to its position for a seamless experience for the rider Water and dust-proof for confidence in creek crossings mud splattering and the resulting post-ride washings Battery sold separately TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Largest Cog 52 Rear Der/Shifter Compatibility SRAM eTap AXS Rear Derailleur Mount Type 10x1 Standard Drivetrain Speeds 12 Chain Wrap Capacity (teeth) 42 Cage Length Long Color Black