Shimano SLX M7100 1x12sp Rear DerailleurThis stunning rear mech delivers fast and shockless shifting for a more stable drivetrain on rough off-road terrains. Its low-profile design features an extra wide 12 speed range which gives you advanced shifting performance and more confidence to enjoy the trails. Additionally, its newly added pulley cage bumper both protects it from trailside obstacles and also keeps it running silently in all gear positions. Features: Material: Alloy Size: Medium Cage Speed: 12 speed Use: MTB Compatible Chain: HG 12 speed Bushings: 4 fluoric coated link bushings Low Sprocket Max: 51T Low Sprocket Min: 45T Top Sprocket Max: 10T Top Sprocket Min: 10T Total Capacity: 41T Max Front Difference: 0T Pulley Teeth: 13T Spring Type: Shimano Shadow RD+Technologies: Shimano Shadow RD+: Less distraction and a quieter drive train. Rear derailleur stabiliser reduces chain slap. A simple solution for chain drop. Lighter and more efficient than a roller type chain device. A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.