I believe they are considered to be motor wheels. They have 6 holes around the outside, the center hole opening is 6 inches. The wheel has 5 lug holes that are 7 1/2 inches center to center. The wheel is 9 inches deep from center of hub hole to the floor. The outside is 7 1/8 inches from outside to outside without the lockring. The tire size that is going on it is 7.50 - 20. The wheels are going on a 1948 GMC 1 1/2 ton wrecker with a holmes 515c rig. We would like to stay all original if possible but will do what we have to do. The wheels on the back looked the worst but were usable, then the front actually looked alot better but the insides were rusted through. The tires have already been purchased so we want something that would be usable with what we have. If you know of anything or have any suggestions that would be greatly appreciated. Thank You