Renthal Ultra-Light Self-Cleaning Aluminium 518U - 420 SprocketRef : RT00345A / 1129514003

Renthal 518U-420-48GPOR: UltraLight aluminum sprocket for motocross. CNC machined in Manchester from a 7075 T6 alloy, this sprocket combines lightness and mechanical strength for riders seeking race-ready equipment without compromising on weight optimization.

The tooth geometry and profiling are designed and tested by computer by Renthal to ensure a precise fit and good concentricity. The anodized orange finish adds a recognizable visual touch to your 420 chain while providing surface resistance suitable for off-road use. The "mud-proof" design helps limit the accumulation of dirt and mud between the sprocket and chain, useful on muddy tracks and in wet conditions.

• Brand: RENTHAL
• Manufacturer part number: 518U-420-48GPOR
• Type: Standard, UltraLight
• Material: 7075 T6 Aluminum (CNC machining)
• Color: Orange
• Number of teeth: 48
• Chain pitch: 420

Ideal for competition motocross bikes and mini-motos, this sprocket fits many 65 cc models (e.g., KTM 65 SX, GAS GAS MC 65) and is suitable for riders who want to reduce unsprung weight while maintaining consistent transmission behavior.