Product Description: Proven to increase tire life, reduce maintenance cost and increase fuel economy by constantly balancing the complete wheel assembly. Our balancers improve tire balance, wheel balance, and complete assembly balance. Continuously Balances the Complete Wheel Assembly While You Drive! No pre-balancing required Lower tire operating temps 8%-10% Smoother Ride Increases tire life 25%-50% Reduces vibration Helps prevent tire cupping Fitment: For 2005-UP F450 and F550 Package includes： 2×Wheel Balancers W/O Product Instruction .
