what is the difference between tire ply?
The main difference between bias ply and radial ply tire is how the tire is constructed. ... The B, C, and D is the load range of a tire. This is the maximum weight that the tire can carry at a specified maximum load inflation. The B is a 4-ply rated tire, the C is a 6-ply rated tire, and the D is a 8-ply rated tire.