The TRP EVO RD-M9050 is a high performing 12-speed rear derailleur that offers features such as an Integrated Hall Lock Lever, Horizontal Parallelogram stabilizer, Instant Silent Clutch and Cage Release.Integrated Hall Lock Lever stabilizes the rear derailleur to eliminate drivetrain noiseIntergrated Hall Lock Lever offers an On/Off feature for easy wheel removal and features adjustable clamping force for breakaway optimizationHorizontal Parallelogram stabilizes the rear derailleur over rough terrainInstant, Silent Clutch prevents unwanted chain slap and noiseCage Release releases cage spring tension and offers easy wheel removal for maintenanceCarbon outer cage provides strength and weight savingsSmooth operating 12t upper and 14t lower pulley wheels feature sealed bearings to provide protection from the elementsItem SpecificationsCage LengthLongChain Wrap Capacity (teeth)42ColorBlack/GoldDrivetrain Speeds12Largest Cog52Rear Derailleur Mount Type10x1 StandardWeight301 TRP RD-M9050 EVO 12-Speed Rear Derailleur Rear Derailleur EAN: 4717592038460