Martin Wheel R-135CS 5-Hole Steel Custom Spoke Trailer Wheel 13x5/5x4.5 Exceeds DOT requirements for highway use. Best replacement wheel for utiltiy, RV and boat trailers. Fits tire sizes: (ST175/80D13); (ST175/80R13); (ST185/80D13); (ST185/80R13) Powder-coat finish resists chipping, scratching, fading and corrosion for a great appearance and longer life. Max Load: 1660 pounds at 65psi Valve stem sold separately. For valve stems, see Part #TR-413-2PAK: Martin Wheel TR-413 Valve Stem 2 Pack