RENTHAL Twinring Aluminium Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket 1500 - 520 for Yamaha WR125, WR250, WR400F

A long lasting durable off-road sprocket developed over 5 years.

The unique flat face design keeps weight to a minimum and means the TwingRing's as narrow as a regular sprocket. Outer is expanded at 200°C and then fitted to inner, creating a permanent bond for the life of the sprocket

• Inner ring is high strength Ultralight 7075 T6 Aluminium
• Outer ring is Electroless Nickel Coated Steel
• Precision CNC Machined to extremely tight tolerances
• Flat socket head screws add additional strength to the sprocket during side impacts
• Self-Cleaning mud grooves between every tooth on both sides prevent dirt build up