Difference Between Trailer Tire Size That Has A Letter D And Letter R
Question:
I went to Walmart to buy a tire for my trailer. My trailer tires are ST205 75D15 and they put me a ST205 75R15. Does it matter?
asked by: Roel
Expert Reply:
The difference between the two trailer tire sizes is that the letter D in the first size you listed ST205/75D15 stands for bias ply and the letter R in the tire size that they put on your vehicle stands for radial.Radial tires are preferred over bias ply, but if the rest of your tires are bias ply and now you have a single radial you would want to strongly consider having all tires match.The main difference between a radial ply and a bias ply tire is how the tire is constructed. The cords inside a bias ply tire run at a 32 degree angle to the direction of travel, and the cords on a radial tire run at a 90 degree angle to the direction of travel, or across the tire from wheel lip to wheel lip.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.I attached a link to a page that has all of the 205/75-15 tires we offer. You will be able to select radial or bias ply from the filters depending on which style you prefer.
Greenball Transmaster Ev Special Trailer Radial
- Large grooves for efficient water expulsion
- Strong sidewall provides greater stability
Description
Before purchasing tires, make sure to use our Tire Finder to select the right fit for your vehicle.
The TransmasterEVspecial trailer tire is designed to handle a variety of towing applications.It’s built with special rubber compounds to help resist wear and improve tire life.Supported by a solid radial design of both nylon and steel plies, it’sengineered for less rolling resistance and a smooth towing experience. Priced affordably, the Transmaster EV is a great value without sacrificing performance.
Speed Rated M, up to 81 mphThe Transmaster EV is speed rated up to 81 mph for dependable towing performance at highway speeds.
Large circumferential grooves for efficient water expulsion Four large grooves help expel water from beneath the tires for greater traction in wet conditions and to help prevent hydroplaning.
Solid Radial Construction