DescriptionModel Number : microNEWTotal Capacity : 13TGears : 12 SpeedMaterial : Aluminum alloy+PA nylonType : Rear DerailleurBrand Name : microNEWComponents : DerailleursFront derailleur weight : about 140gRear derailleur weight : about 367gFor : Mountain BikemicroNEW 1x12 Speed Rear Derailleur Mountain Bike 12S Shifter Lever With Shift Cable For MTB 12 Speed DerailleursBrand: microNEWSpeed: 12 speedMountain bike 12V rear derailleurNumber of teeth: 13TWeight: about 367gMaterial: aluminum alloy + PA nylon guide wheelConnecting rod push designImprove shifting response speed, make shifting more effortless, and reduce bounce and chain jump caused by bumps.13T guide wheelSteel guide wheel arm + PA nylon wear-resistant guide wheel, sealed bearing, smooth rotation, reduce chain wear and smooth speed change.H, L main body adjustment screwH and L are positioning screws. Adjusting these two screws is to ensure that the chain is between the largest piece and the smallest piece of the flywheel. H: high position; L: low position.Tension screw, adjust the tension of the rear dial, thus affecting the shifting response time.12 speed mountain bike shifterWeight: about 140gSpeed: 12 speedMaterial: PA nylonSuitable for 22.2mm handlebars, cable length is about 2.1m (right rear)