Trailer Tire Sizing
The tires on a boat trailer might be labeled: ST175/80D13 C. *ST – These tires are for a trailer (Specialty Tire for trailer use only) *175 – The maximum width of the tire is approximately 175 mm at the widest point. *80 – Indicates the height of the sidewall is 80% of the width (in this case 140 mm
What is the difference between ST175 80R13 and ST175 80D13?
The D in 175/80D-13 indicates that it is a bias ply tire where as the R in 175/80r-13 indicates that it is a radial tire. The difference is how the steel belts inside are oriented. Bias ply tires are generally better in off road types of situations.
What size tire is ST175 80D13?
175/80R13 tires have a diameter of 24.0″, a section width of 6.9″, and a wheel diameter of 13″. The circumference is 75.4″ and they have 840 revolutions per mile. Generally they are approved to be mounted on 4.5-6″ wide wheels.
What does D mean on trailer tire?
The D is the designation for the internal construction of the tire. The D stands for diagonal or bias ply construction. That means the tire body plies inside the tire will crisscross. The 15 is the wheel diameter in inches and the C after the tire size will designate the load range.
What is the difference between st175 and st185?
If you go with a smaller 175 tire and wheel combo, it will be about a half inch more narrow, and little over half an inch shorter than the 185. The biggest difference is capacity. The smaller 175 that you referenced has a capacity of 1,360 pounds at 50 psi.
What does the D stand for in st175 80d13?
D stands for bias-ply which is a less preferred tire construction, whereas R stands for radial. Because of the construction of a radial tire, the tire has more flex and will allow for more ground contact. That will improve traction and better tread wear. It also gives the radial tire better stability.
What is the difference between R13 and D13 tires?
Helpful Expert Reply: Yes, you can run a 175/80-R13 tire on a trailer that came with a 175/80-D13 tire. The only difference between the two is that “R” stands for radial ply and “D” stands for diagonal.
How tall is a 155 80R13 tire?
155/80R13 tires have a diameter of 22.8″, a section width of 6.1″, and a wheel diameter of 13″. The circumference is 71.5″ and they have 886 revolutions per mile. Generally they are approved to be mounted on 4-5″ wide wheels.
What’s better load range D or E?
The load index determines how much weight per tire you can handle. D and E is the load range meaning that the D is 8 ply rated with a max psi of 65 and E is 10 ply rated with a max pressure of 80 psi. Like mentioned above, E is better for towing because you can fill the tire with more air pressure.
Which is better R or D tires?
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. For those reasons I would recommend an R tire over a D tire.
What is the C on a TYRE?
C-Type tires are tires designed for certain cargo vans, specifically meant to handle high loads. C-Type tires are designed to accommodate the heavy loads that modern, European-style cargo vans require. This C-Type tire classification originated in Europe and is now also on vehicles sold in North America.
