RENTHAL Twinring™ Rear Sprocket - 50 Tooth - Black 1500-520-50GPBK Transmission Seal Kit RadiusX combines TorqDrive® friction disc

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

The foot shell features five different compounds in a single lightweight piece to offer strength while maintaining flexibility and structural integrity

Sweater knit rib jersey stitch construction

Stretch twill main fabric

RENTHAL Twinring™ Rear Sprocket - 50 Tooth - Black 1500-520-50GPBK Transmission Seal Kit RadiusX combines TorqDrive® friction discInner 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