JT TwinStar Hybrid Aluminium Steel Rear Sprocket 51 Teeth (JTX 210.51)Features: Fully heat treated for higher wear resistance Meet or exceed Japanese OEM standards Optimum design for light weight and strength Perfectly finished in zinc or black enamel coating We are very pleased to be able to announce the availability of our new TwinStar Steel Aluminium hybrid sprocket. The JT TwinStar range has seen much development in producing the lightest, most durable bi metal sprocket on the market today. An extensive test

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