RENTHAL Ultra-Light Aluminum Sprocket 518U - 420 (47 teeth) — Manufacturer part number: 518U-420-47GPBK
Designed for motocross, this Renthal UltraLight sprocket combines lightweight construction with precision machining. Made from 7075 T6 aluminum and CNC machined in Manchester (UK), it features tight tolerances and a reduced weight — up to 66% lighter than steel — while maintaining the necessary strength for transmission on muddy tracks. The tooth profiling and computer-aided design optimize concentricity and load distribution.
- Material: 7075 T6 Aluminum
- Color: Black
- Number of teeth: 47
- Chain pitch: 420
- Type: Standard, mud-resistant
- Finish: Wear-resistant surface treatments
Ideal for off-road training and racing, this sprocket fits 420 transmissions. It is frequently chosen by teams and riders looking for a lightweight and reliable part for the rear wheel.
Compatible motorcycles (examples):
- KTM 65 SX (2025)
- GAS GAS MC 65 (2025)
