The most robust Deore XT 12-speed mechanical rear derailleur to date promises a reliable robust ride for every discipline. It&';s based around a modern hanger and a new low-profile wedge-shaped design to avoid impacts on the trail. If it does hit rocks or roots a spring inside the derailleur helps it absorb impact and return to its original position. With a 510% gear range the RD-M8200 derailleur is suitable for every ride be it an enduro race or all-day adventure.Shadow ES design provides a slimmer stronger evolution of Shimano&';s pioneering chain-stabilizing Shadow conceptWedge-Shaped Design is made to move out of the way to absorb trail impacts for a worry-free rideSolid pulley and shielded pulley teeth prevent trail debris from jamming up your flow13t pulley wheels feature sealed bearings to provide smooth movement TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Largest Cog 45 Rear Der/Shifter Compatibility Shimano Mountain Rear Derailleur Mount Type Shimano Rear Direct Mount Drivetrain Speeds 12 Chain Wrap Capacity (teeth) 36 Cage Length Medium Color Black Weight 365