The orange (and silver) rear sprocket is already a true classic that has established itself with great features and benefits: Manufactured from high-strength 7075-T6 aluminum, the strongest aluminum in the world. Free from vibration - therefore the highest power transmission efficiency. No small stones or dirt particles can become stuck under the chain thanks to angled recesses between the teeth. Anodized with a permanent, organic and environmentally-friendly pigment. KTM PowerParts P/N: 583.10.151.045.