(Rear) Tire Size - Bias / Radial - Load Index
120/90-17 - Bias Ply - 64
120/90-18 - Bias Ply - 69
130/80-17 - Bias Ply - 65
130/90-18 - Bias Ply - 69
140/80-17 - Bias Ply - 69
140/80-18 - Bias Ply - 70
150/70-17 - Bias Ply - 69
150/70-18 - Bias Ply - 70
170/60-17 - Bias Ply - 72