Quote:
Originally Posted by JRTJH
The "J" rating on the tires in your link is NOT a "load/ply" rating which we normally see as G-14 ply, F- 12 ply, E-10 ply, D-8 ply, C-6 ply. A load range J tire is a 18 ply tire with a PSI recommendation of 127 PSI, probably much heavier than you'd ever want to put on a travel trailer of any size or weight. The "J" has no bearing on the ply rating or the load rating, but is a "designator" to identify the loading range not the ply ratings, just as the speed rating letters, L, M, Q, Z all represent different speed ratings for the tires.
The tires in your link are 225 75R15 LRD (8 ply) tires rated to carry a maximum of 2540 pounds at 65 PSI. That is the typical load rating for ALL tires of that size and that ply rating at that PSI.
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"J" has got to be a typo.
The initial description shows D/8 which is the Load Range / Ply Rating.