Renthal Ultralight Aluminum Rear Sprocket, 49-Tooth Silver (518U-420-49GPSI)

Upgrade your motorcycle’s drivetrain with the Renthal 518U-420-49GPSI Limited Edition Ultralight Rear Sprocket. Designed for GasGas, Husqvarna, and KTM applications, this 49-tooth aluminum chainwheel combines race-proven performance with a distinctive silver hard-anodized finish. The limited-edition design offers a unique appearance inspired by the sprockets used by leading Renthal riders during the Monster Energy Supercross Series.

CNC-machined from high-strength 7075-T6 aluminum, the Renthal Ultralight Rear Sprocket is engineered to reduce unsprung and rotating weight compared with conventional steel sprockets. Its lightweight construction helps support responsive acceleration and agile handling while maintaining the strength required for demanding motocross, off-road, and competition use. Computer-aided engineering and testing help ensure consistent fitment, concentricity, and load distribution across the drivetrain.

The precision tooth profile is designed to promote efficient power transfer and dependable chain engagement. Tight manufacturing tolerances help the 518U-420-49GPSI maintain smooth operation under hard acceleration, while the durable hard-anodized surface provides added protection against wear and corrosion. Verify your motorcycle’s model, year, chain size, and mounting pattern before installation to ensure proper compatibility. Renthal delivers trusted drivetrain components for riders who demand reliable performance and professional-level quality.

Features:

• Brand: Renthal

• Part Number: 518U-420-49GPSI

• Application: GasGas, Husqvarna, and KTM motorcycles

• Tooth Count: 49 teeth

• Material: CNC-machined 7075-T6 aluminum

• Finish: Silver hard-anodized surface

• Construction: Ultralight design engineered to be significantly lighter than steel

• Performance: Computer-engineered for precise fitment, concentricity, and load dispersion

• Tooth Profile: Designed for efficient power transfer and smooth chain engagement

• Edition: Limited Edition chainwheel design

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