AS3 Performance 7075 aluminium rear sprockets are a top - notch choice for your 2021 Rieju MR 300. Crafted by one of the world's leading sprocket manufacturers, these sprockets have been tested by the best riders on the toughest tracks globally. Made from high - quality 7075 - T6 aluminium through CNC machining, they are lightweight yet extremely durable. Each tooth has self - cleaning grooves, and the sprockets feature a smooth anodised finish with AS3 Performance branding. With 50 teeth, it fits 2021 Rieju MR 300 Racing, Pro, and Ranger models. It's over 50% lighter than standard OEM steel sprockets, designed for maximum strength with minimum weight. A UK company offers a 12 - month warranty, and the sprocket you receive will be exactly the style in the picture.

Using your AS3 Performance 7075 aluminium rear sprocket is easy. Just install it on your 2021 Rieju MR 300 (Racing, Pro, or Ranger models). Make sure it's properly tightened. When riding, the self - cleaning grooves will help keep dirt and debris away. As for maintenance, regularly check the sprocket for any signs of wear or damage. You can clean it with a mild soap and water solution and dry it thoroughly. Since it's anodised, avoid using abrasive cleaners that could scratch the finish. If you notice any issues, contact the UK company for their 12 - month warranty support. And remember, this sprocket is designed to be lightweight and strong, so it'll enhance your bike's performance on various tracks.