JT. Aluminium Ultra-Light 251 - 520 SprocketRef : JTC00513A / 1096568003

Manufacturer Ref: JTA251.50BLK — JT SPROCKETS ultra-light aluminum sprocket 251 in 520. Designed for replacing the sprocket or modifying the gearing of your transmission, this part is aimed at motocross riders as well as roadster enthusiasts looking for a lightweight and precise product.

• Material: 7075-T6 Aluminum (Ergal)
• Color: Black
• Number of Teeth: 50
• Chain Pitch: 520
• Type: Standard / ultra-light

The JT Sprockets JTA251.50BLK sprocket is presented as a lightweight option for the rear wheel, maintaining the standard geometry suitable for 520 chain kits. Its Ergal design offers a good mass/stiffness ratio, useful for those looking to reduce inertia without radically changing the behavior of the transmission.

Compatibility: be sure to check the mounting pattern and spacing before installation. Examples of models commonly associated with this reference: YAMAHA YZ 450 F (2026), FANTIC XX 125 (2022), GAS GAS EC 300 F (2015). Replace the sprocket with a professional or follow the manufacturer's recommendations for safe installation.