Renthal Ultralight Rear Sprocket - 51T - 123U-520-51

Renthal Ultralight rear chainwheels are manufactured to exteremly tight tolerences from a special material developed to withstand the rigours of Supercross, Motocross and Enduro.
The 7075 T6 aluminium alloy rear chainwheels are 66% lighter than steel, yet incredibly durable.
Their advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-life.
Renthals combination of a very high strength base material and an exceptionally hardwearing surface result in significantly increased chainwheel life