SIZE PR Tread Depth(mm) Standard Rim Load Index Speed Rate 12R22.5 18PR 17.0 9.00 152/149 L 11R22.5 16PR 16.0 8.25 148/145 M 295/80R22.5 18PR 16.0 9.00 152/149 M 275/80R22.5 18PR 15.0 8.25 149/146 L 275/70R22.5 16PR 14.0 8.25 144/141 M 315/60R22.5 18PR 14.0 9.75 152/148 L 315/70R22.5 18PR 14.5 9.00 152/148 M