4" diameter x 2-3/4" rim width x 2" hub length (1 pc.) Rim with a 2" offset hub. Use 2 of our 326 bearings for a 5/8" axle or 481 heavy duty bearings for 5/8" axle, or use 2 of our 327 bearings for a 3/4" axle. Rims can be used tubeless (white).