









RENTHAL Twinring Ultra-Light Mud-Resistant Anodized Hard HA Aluminum Sprocket - 520 (Manufacturer part number: 2240-520-50GPOR)
The RENTHAL Twin Ring combines an ultra-light 7075 T6 aluminum core with a hardened steel tooth profile to provide a bi-component sprocket designed for competition and demanding use. Its "Twinring" construction maintains an internal profile as narrow as a classic sprocket while reducing unsprung mass. The hard anodized HA surface limits mud adhesion and protects the aluminum, while the electrolytically nickel-plated tooth profile is hot-assembled to remain bonded to the structure.
Designed for motocross and roadster practices, this sprocket fits many 520 applications where a balance between lightness and tooth durability is sought. Examples of compatible models: GAS GAS SM 700, KTM 690 SMC R, DUCATI DESMO 450 MX.