Tires with unequal contact and grip on the road cause unequal braking. The inflation and the tread pattern of the right and the left tires should be equal.

The most heavily loaded wheels on the vehicle require more braking force when the loading is unequal.

Loose front wheel bearings permit the rotor to tilt. Loose front wheel bearings also cause the rotor to have spotty contact with the linings. A tilted rotor that has spotty contact with the lining causes erratic braking.

Misalignment of the front end will cause the brakes to pull to one side of the vehicle.