RENTHAL Twinring™ Rear Sprocket - 49 Tooth - Black 1500-520-49GPBK Battery Cable Hook-and-loop-material waist adjustment for improved

Hook-and-loop-material waist adjustment for improved riding fit

Kitted sets of intake and exhaust valves designed to match the OE material specifications for drop-in compatibility (no need to reconfigure spring pack from OE specs)

Pre-curved finger construction for fit and reduction in rider fatigue

Tech-Air® Ready with left arm slot for Tech-Air® 10 LED display

Open cell protection components for lightweight and ventilation

RENTHAL Twinring™ Rear Sprocket - 49 Tooth - Black 1500-520-49GPBK Battery Cable Hook-and-loop-material waist adjustment for improvedInner 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