SECTION II. EQUIPMENT DESCRIPTION AND DATA (Con't)
1-9. TIRE MARKINGS AND CODES (Con't).
d. PLY RATING AND LOAD RANGE.
Methods of indicating ply rating, or the strength of a tire are either with a ply rating or load range
imprinted on the tire sidewall. The ply rating number and/or load range character are designations of the
tire strength and do not necessarily indicate the actual number of cord plies. A tire with an 12 ply rating or
F load range may actually have less than 12 cord plies but would be of equal strength to a tire with 12 cord
plies. In the example, 12 ply or F load range indicates a ply rating of 12. The load range letters A through
N represent the ply rating in even numbers 2 through 24 respectively (see Table 1-3).
Table 1-3 Ply Rating Vs. Load Range