RENTHAL Twinring™ Rear Sprocket - 50 Tooth - Black 1500-520-50GPBK Transmission Seal Kit Stretch panel on forearms to

Stretch panel on forearms to increase flexibility and movement

Sweater knit rib jersey stitch construction

Available in Chrome over Carbon Steel

Saves coolant from spilling out and then return it to the radiator when cooled

RadiusX combines TorqDrive® friction disc technology with Rekluse's innovative EXP (auto clutch) disc

RENTHAL Twinring™ Rear Sprocket - 50 Tooth - Black 1500-520-50GPBK Transmission Seal Kit Stretch panel on forearms toInner ring is the same high strength Ultralight 7075 T 6 aluminum used for the standard Renthal sprocket Outer ring is electro less nickel coated steel for ultimate durability and is designed with the minimum amount of material to keep weight down The outer ring is expanded at 200C and then fitted over the inner; this interference fit combined with the wave pattern ensures a permanent bond for the life of the chainwheel The flat socket head screws add