JT Twinstar Rear Sprocket 49T (520) - JTX897.49GR

The core of the JT TwinStar is a lightweight aviation grade Ergal 7075-T6 Aluminium, precision made using state of the art laser cutting and CNC machining. The steel outer ring is heat-induction hardened to create a sprocket which will last up to six times longer than a standard 7075-T6 aluminium sprocket.

Features:

• Made from the latest generation of computer design and control metal cutting equipment for maximum durability
• Fully heat treated for higher wear resistance
• Optimum design for light weight and strength