Wheel adapters 5 on 4 1/2 by 5 on 4 1/2 bolt pattern. The wheel adapters are for a Bronco II or Ford Ranger. The adapters are made of 1 1/4 inch thick billet aluminum. They give the vehicle a wider stance so the tires will not rub the radius arm during a full turn. They are $39.95 a piece. Call 1-888-269-3969 if you have any questions.