Differences Between ST175/80D13 and Tire Size ST175/80R13

Question:

i currently have st175/80 d13 on pop up camper, would a Carlisle Radial Trail HD Trailer Tire - 175/80R13 96Md work on my pop up camper.

asked by: Tony

Expert Reply:

Yes, the two tire sizes are the same with the only difference being the R13 is a radial instead of a bias ply. Radial being the preferred style.

Radial tires are preferred over bias ply tires so I would recommend you go that route. A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear.

A radial tire will normally run cooler than a bias ply tire, especially when the tire is under a load. A tire that runs cooler will last longer.

The part # TTWTRTM1758013C is a radial in the size you need and would be a great choice. It has a higher speed rating of 81 mph.

expert reply by: Jameson C