Renthal 1500-520 Grooved Twinring Rear Sprocket

Renthal 1500-520 Grooved Twinring Rear Sprocket Black 49t. Compatible models:YAMAHA WR 250 F Enduro GP 2018.YAMAHA WR 450 F Enduro GP 2018.YAMAHA YZ 250 F 50th Anniversary Limited Edition 2006.YAMAHA YZ 250 F 60th Anniversary 2016.YAMAHA YZ 400 F 1999.YAMAHA YZ 450 F 50th Anniversary 2006.YAMAHA YZ 450 F 60th Anniversary 2016.YAMAHA YZ 450 F SP 50th Anniversary Limited Edition 2006.Twinring™ Rear Sprocket.Inner 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 200°C 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 additional strength to the chainwheel during side impacts and eliminates contact with the chain guide.Self cleaning mud grooves between each tooth prevent dirt build upand reduce chainwheel wear and weight.Will outlast a standard all aluminum sprocket by 3 times, yet is much lighter than an all steel rear sprocket. tradeinn Motardinn