Jt Rear Sprocket Steel 37t-520 Yamaha

Made from advanced aviation-grade 7075-t6 aluminum alloy, optimal lightweight design and cnc-machined for performance and lifespan! all aluminium mx rear racing sprockets are manufactured from the best materials with a special self-cleaning design, and hand-finished to perfection. made from the finest 7075-t6 aluminum. designed and built with the latest generation of computer design and control metal cutting equipment for maximum durability. heat-treated and hand-finished to meet or exceed the highest possible quality standards. note: designated models require the purchase of a jt sprocket carrier, sold separately.