Tire balancing, also known as wheel balancing, is the process of correcting the uneven distribution of weight in the wheels of a vehicle. When wheels are not properly balanced, they can cause vibration, excessive tire wear, damage to the suspension, and other problems. During a tire balance service, a technician mounts the wheels and tires onto a balancing machine, which spins the tire and wheel assembly to measure the imbalance. The technician then installs the correct tire weights to achieve a properly balanced wheel and tire assembly. Tires may need to be rebalanced if the driver perceives excessive vibration or uneven tire wear. Tire balancing is distinct from wheel alignment, which refers to adjusting a vehicles steering and suspension angles to keep all wheels pointing in the same direction for safety and performance.