Engineered from premium materials and finished to impress, the S500 Eagle AXS Ultimate Upgrade Kit delivers the full power of AXS wireless technology to every kind of rider. As the crown jewel of the Eagle S-Series, the S500 is built to excel across MTB, E-MTB, and gravel disciplines without compromise. This complete kit ships with everything you need to transform your drivetrain. Compatible with every AXS controller, including drop-bar shifters, it's the ultimate high-end upgrade for riders who expect versatility, style, and performance that lasts. What's Included S500 Eagle AXS Rear Derailleur - The Eagle AXS derailleur delivers wireless performance with effortless setup and seamless AXS integration. An Overload Clutch absorbs impacts and self-corrects without interrupting the ride, while full sealing handles any conditions. S500 XG-1299 Cassette - The XG-1299 offers a 520% gear range, letting powerful riders run larger chainrings for more top-end speed without sacrificing climbing. The X-Dome architecture and XD driver compatibility open up broad Eagle upgrade paths. AXS POD Controller - The AXS Pod offers a lighter, more personalized alternative to standard AXS controllers. Updated ergonomics and wide adjustability combine with an intuitive two-button "click and fire" design that requires minimal input to activate. S500 Eagle Chain - The S500 chain blends strength, light weight, and consistent performance into one precision-engineered package. Expect whisper-quiet, smooth operation ride after ride. Power & Setup - AXS Battery, USB-C Charger (USB-C cord not included), and chaingap tool Derailleur Cassette Controller Chain Works With Eagle AXS S500 Rear Derailleur Model ID: RD-S500-E-B1 Speeds: 12-Speeds Shift Tech: Wireless Max Tooth: 52t Cage Material: Aluminum Drive Config: 1x Chain Tech: Eagle S500 XG-1299 Cassette Model ID: CS-XG-1299-C1 Range: 10-52t Speed: 12-Speed Cog Sizes (10-52t): 10-12-14-16-18-21-24-28-32-36-42-52t Drivetrain Config: 1x Freehub Interface: SRAM XD AXS POD Controller Model ID: EC-AXS-POD-D1 Controller Type: Wireless Orientation: Left, Right Clamp: Discrete Rocker Paddle: Optional, not included S500 Eagle Chain Model ID: CN-EAGL-S500-A1 Speeds: 12-Speed Length: 126 links Chain Connector: PowerLock (Included) Pin: Solid pin Inner Link Finish: Chrome plated +PVD Outer Link Finish: Chrome plated +PVD E-Bike: Yes Compatibility - SRAM Eagle S-Series, including the S100, S200, and S500, are built to work seamlessly with previous generation SRAM Eagle 12-speed components (SX, NX, GX, X01, XX1), offering backward compatibility with your existing drivetrain - S-Series components are not compatible with SRAM Transmission (T-Type) - The XG-1299 Cassette is only compatible with SRAM XD freehubs