§ 72.25 MAXIMUM WEIGHT ON IRON AND SOLID TIRES.
   No person shall operate on a highway a vehicle that has greater weight on any tire per inch of width of the tire which is in contact with the surface of the highway, than 400 pounds, for iron or steel tires, or 600 pounds, for solid rubber or rubber compounded tires.
(KRS 189.200) Penalty, see § 70.99 (A)