Question: what is the difference between 14 ply and 16 ply?
Answer: Therefore, a 16-ply tire had 16 actual plies of cotton cord, while a 14-ply tire only had 12 plies of cord. This enabled the 16-ply tire to be run at a higher PSI and thus carry more weight. Of course tires are no longer made with cotton cord. Modern truck tires only have one casing ply of steel.