Modern and light-weight tyre clamp made of high-strength plastic and CNC machined fastening nut and a special spacer for the rim. Tyre clamps made of metal or aluminum are too heavy and tend to cause an imbalance in the wheel. Tyre clamps help prevent slippage of the tyre on the rim, such as in motocross or trials where tyre pressures tend to be low. Hard braking or fast acceleration may rotate the tyre on the rim and so pull the valve from the tube. Game Over! Fitment note: where there is no factory mounting groove, this should be positioned opposite the tyre valve hole. Delivery: 1 piece