The Sram Rival 1 Type 3.0 Rear Derailleur has been designed for 1x transmissions with a capacity between 36 and 42 teeth and 11 speeds, while their materials and technologies offer you fast and effortless shifting, chain tension, and includes a bearing clutch that eliminates wheel bounce and chain bumps.This bike rear derailleur is made of aluminum, while the pulley bearings are steel. The X SYNC technology provides good performance, simple shifting, and silent operation. The X HORIZON allows for faster and effortless shifting. Besides, it comes with a cage lock that makes wheel removal and installation easier.Features:- Your needs aren®t less demanding, they®re different.- The SRAM Rival 1 rear derailleur is engineered for smooth, reliable shifting action, - Delivering 100% of what you demand.By eliminating unwanted chain movement, X-HORIZON® shifts faster, reducing shift effort and chain slap.- X-HORIZON® design reduces shift force while eliminating ghost shifting and chain slap- Large upper pulley offset automatically adjusts chain gap- Sealed cartridge bearings and aluminum cage- Technologies:X-HORIZON®, EXACT ACTUATION®, X-SYNC®, ROLLER BEARING CLUTCH®, Cage Lock®- Medium cage:11-26 through 11-36T cassettesSpecifications:- Speeds:11-speed- Outer Cage:Aluminum- Compatibility:10 or 11-speed 1x road systems- Inner Cage:Aluminum- Bearings:Sealed cartridge- Cage Size:Medium 11-26 through 11-36T- Pulleys:12-Tooth X-SYNC®- Pull:Exact Actuation®- Technology Highlight(S):X-HORIZON®, CAGE LOCK®- Weight:approx.269 gr.® medium cage.For 2x10V systems.- Compatible with cassettes 11-42T.