SRAM GX Eagle 12 Sp Rear DerailleurDesigned for versatility, this MTB rear mech features a robust aluminium inner and outer cage construction, which makes it more than ready to tackle whatever the off-road has to offer. SRAM has also equipped this version with steel pulley bearings for additional durability on every ride. Developed around a backwards-compatible profile, this model works with both 10-50T and 10-52T cassettes for greater flexibility. Another benefit is its updated cage design that delivers greater chain retention than before and even more precise shifts, as you weave between the trails. Coming complete with a number of different colour options, this is rear mech looks as amazing as it performs on your mountain bike.- Backwards compatible, works with both 10-50t and 10-52t cassettes- Updated cage architecture provides better chain retention and precise shifts- Comes in GX Eagle master colourway as part of Eagle Coloursystem and goes with all colours of Eagle cassettes & chainsRiders want the derailleur to do its job shifting on command, whether under climbing load or the stage finish. The GX Eagle derailleur gets it done with an updated cage architecture that improves chain management. Refined to work with the new 10-52t cassettes, it's also backwards compatible for the 10-50t versions. Giving riders choice, because that's how it should be. Finished with the new GX Eagle master colourway - to compliment any cassette and chain colorway a rider wants from the Eagle Coloursystem. Further proof that the GX Eagle derailleur is there for one thing - to do the job.Features: Material: Cage: Aluminium; Pulley Bearings: Steel Use: MTB, Cross-Country and Enduro Mount: Standard Speed: 12 speed Type: Rear derailleur Cage Type: Long Max Tooth: 52 Cable Pull Ratio: X-Actuation Single or Pair: Single Part Number: RD8137000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.