TBR TYRE F668 Size Ply Rating Speed Symbol Standard Rim Inflation Pressure Maximum Load Inflated Section Width Inflated Overall Dimeter O.T.D 11R22.5 16 L 8.25 830/830 146/143 279 1054 19.5 12R22.5 18 L 9.00 930/930 152/149 300 1096 20.0 315/80R22.5 20 L 9.00 850/850 156/150 310 1075 20.0