Renthal Ultra-Light Self-Cleaning Aluminium 518U - 420 SprocketRef : RT00230A / 1129515003

Renthal 518U-420-48GPBK – UltraLight aluminum sprocket machined from CNC, designed for motocross use. Made from 7075 T6 aluminum in Manchester (UK), this sprocket combines lightweight construction with high precision manufacturing: tight tolerances and tooth profiling optimized for chain contact. Designed with a mud-resistant profile to facilitate dirt evacuation and limit clogging in off-road conditions.

• Brand: RENTHAL
• Reference: 518U-420-48GPBK
• Material: 7075 T6 Aluminum (CNC machining)
• Number of Teeth: 48
• Chain Pitch: 420
• Color: Black
• Type: Standard, UltraLight mud-resistant version

With a mass up to 66% lower than that of a steel sprocket, the 518U aims to reduce unsprung weight and improve motorcycle handling without compromising on finish: wear-resistant surface treatments and meticulous machining. Ideal for motocross machines and suitable for small displacement competition bikes, it is particularly compatible with KTM 65 SX and GAS GAS MC 65 (2025 models). Replace your standard sprocket with a part designed for off-road use and the demands of muddy terrains.