Tires with unequal contact and grip on the road cause unequal braking. Make sure the inflation and tread pattern of the right and left tires is about equal. Refer to Tire Inflation Description in Tire and Wheels.

When the vehicle has unequal loading, the most heavily loaded wheels require more braking force than the others.

Loose front wheel bearings permit the rotor to tilt and to have poor contact with the linings. This causes eratic braking. Refer to Wheel Bearing Adjustment and Wheel Bearing Adjustment in Front Suspension.

Misalignment of the front end, particularly camber and caster, causes the brakes to pull to one side. Refer to Front Caster Adjustment and Front Camber Adjustment in Wheel Alignment.