—$397.39

With the fast and accurate Di2 shifting technology, the Shimano 12-speed Ultegra RD-R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11-28, 11-30, and 11-34 cassettes. Compact design includes an integrated wireless unit, charger, switch Wider range capacity Max. low sprocket 34t LED status indicator Battery indicator, pairing, adjust mode etc. Item Specifications Cage Length Medium Chain Wrap Capacity (teeth) 39 Color Black Drivetrain Speeds 12 Largest Cog 34 Rear Der/Shifter Compatibility Shimano Road Di2 Rear Derailleur Mount Type 10x1 Standard Rear Derailleur Mount Type Shimano Rear Direct Mount Shimano Ultegra RD-R8150 Di2 12-Speed Rear Derailleur Rear Derailleur UPC: 192790240961

by Shimano

—$700

The heart of the AXS ecosystem is lighter, more efficient, and more capable than ever. Covering cassette ranges from 10-28t up to 10-36t, this wireless wonder has larger pulleys to decrease chain articulation and increase efficiency, and an Orbit fluid damper to keep everything in place over the rough stuff. One derailleur ready for 1x or 2x, on road or off. Orbit chain management technology keeps the drivetrain quiet and secure AXS enabled for easy setup, personalization, and reliability 16g lighter than previous generation Compatible with both 1x and 2x RED drivetrains Compatible with cassettes from 10-28t to 10-36t Larger X-Sync pulleys for increased efficiency Compatible with existing AXS batteries (Sold separately) Item Specifications Cage Length Medium Color Black Drivetrain Speeds 12 Largest Cog 36 Rear Der/Shifter Compatibility SRAM eTap AXS Rear Derailleur Mount Type 10x1 Standard Weight 262 SRAM RED eTAP AXS Rear Derailleur E1 Rear Derailleur UPC: 710845899812

by SRAM

—$814.99

The Shimano Dura-Ace RD-R9250 rear derailleur integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worthy of any podium. A single cage length shifts cassettes from 11-28 to 11-34, offering exceptional versatility. Ultra-fast rear Di2 shifting Compact design includes an integrated wireless unit, charger, switch Wider range capacity Max. low sprocket: 34t CFRP rear derailleur plate LED status indicator Battery indicator, pairing, adjust mode etc. Item Specifications Cage Length Medium Chain Wrap Capacity (teeth) 37 Color Black Drivetrain Speeds 12 Largest Cog 34 Rear Der/Shifter Compatibility Shimano Road Di2 Rear Derailleur Mount Type 10x1 Standard Rear Derailleur Mount Type Shimano Rear Direct Mount Shimano Dura-Ace RD-R9250 Di2 12-Speed Rear Derailleur Rear Derailleur UPC: 192790240954

by Shimano