A system of measuring and labeling the carrying capacity of the tires.
Letter indicates tire load-carrying capacity (e.g. B, C, D and E). See image.
A system of designations, which identifies the carrying capacity range of a tire. These markings shown on the tire indicate the ply rating established for the tire. Passenger tire designations are B (4-Ply rating), C (6-Ply Rating) and D (8-Ply rating). This system was established by the Rubber Manufacturers' Association and is used on all American-made tires. Replaces ply rating.
Letter code system for the weight carrying capacity of tires. Comparable ply ratings are shown below. LR PR LR PR A .... 2 E .... 10 B .... 4 F .... 12 C .... 6 G .... 14 D .... 8 H .... 16 (LR = Load Range PR = Ply Rating)
This term replaces the former ply rating system and provides the load and inflation limits of a tire.