# What is the most common trailer tire size?

Typically, a 225/75-15 tire will measure about 8-3/4 to 9 inches wide by around 28-1/2 inches in diameter.

Typically, a 225/75-15 tire will measure about 8-3/4 to 9 inches wide by around 28-1/2 inches in diameter.

One may also ask, what is the difference between load range C and D? The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The D rated tire has a higher capacity. For a ST175/80D13 like # AM1ST77, the capacity is 1,610 pounds at 65 psi. For a C load range in the same size, like # AM1ST76 , the capacity is 1,360 pounds at 50 psi.

Accordingly, why do trailers need special tires?

The stiffer sidewalls and higher operating pressures common with Special Trailer (ST) designated tires help reduce trailer sway. “Trailers will be more stable and pull better on tires designed specifically for trailer use.

What’s the difference between a trailer tire and a car tire?

Truck or car tires are made to be on a lead vehicle. They have thick tread to maintain traction on slippery road and sharp turns. They are also designed to handle the higher speeds of highway driving. Trailer tires, on the other hand, are designed to be on a following vehicle.

### How do you measure trailer size?

Typically the 6th and 7th numbers of the VIN indicate the length of the trailer. You can verify that by measuring from the rearmost point on your trailer to the point of the trailer closest to your vehicle. This will include the coupler or any overhang.

### How do you read tire sizes?

Tire Size Markings P = Passenger Car Tire. The first letter on a tire indicates the tire’s class. 245 = Section Width. Tread (mm) 45 = Aspect Ratio. (Ratio of Sidewall height to width) Z = Speed Rating. S = 112mph. R = Radial. Construction. 19 = Wheel. Diameter. 98 = Load. Index. W = Speed. Rating.

### What size tire is 4.80 8?

The overall diameter of a 4.80/4.00-8 tire is 16.1 inches. The overall diameter of the 5.70-8 tire is 18.1 inches.

### What does 4.80 8 mean on a tire?

The size 400/480 and 4.00/4.80are the same tire size. On your current tires, the 4.80 number represents the section width of the tire, or the width across the tread. The second number is the wheel diameter size. You have a wheel that has a 8 inch diameter.

### What trailer tires are best?

The Best Trailer Tires Carlisle Radial Trail HD Trailer Tire. Maxxis M8008 ST Radial Trailer Tire. Boat Trailer Utility White Spoke Trailer Wheels. ST 225/75r15 Freestar M-108 10 Ply E Load Radial Trailer Tire. Trailer King ST Radial Trailer Tire – 225/75r15 117l. 2 New Trailer Tires ST 205/75r14 8pr Load Rangd D.

### What is the smallest 15 inch tire?

Tire Sizes by Wheel Diameter 15″ Options 145/65-15 195/50-15 225/70-15 155-15 195/55-15 225/75-15 155/60-15 195/60-15 235/50-15 155/80-15 195/65-15 235/60-15

### Does Discount Tire sell trailer tires?

Sold exclusively by Discount Tire, Hartland trailer tires deliver an excellent combination of value and quality. Designed to carry heavy loads while being towed, trailer tires can be used for boats, campers or utility trailers. Choose from bias ply and radial ply options.

### What is the difference between D and R on tires?

The D indicates that the tire is a diagonal bias ply construction and the R indicates that the tire is a radial tire construction. Beyond the size and type, there are load ranges for tires.

### Why do my trailer tires keep blowing out?

A lot of trailer tire blowouts are a result of heat build up that causes the tire to fail. There are several things that can cause too much heat to build up but the main two most likely suspects are overloading the trailer and/or under inflated tires. Light truck or passenger vehicle tires should not be used.

### Should I put extra air in my tires when towing?

For towing, tires should be inflated to the max cold pressure listed on the sidewall of the tire. You DO NOT want an under inflated tire for towing, because the sidewalk will flex and generate heat, damaging the tire and risking a blow out. Also, the vehicle will not be as stable pulling a trailer at a lower PSI.

### How long are trailer tires good for?

Three to five years

### What PSI should my trailer tires be at?

Boat-trailer tires require a lot of air pressure — in most cases, between 50 and 65 psi. In fact, the correct tire pressure for your boat trailer is almost always the maximum-rated pressure for that tire, which is molded right on the sidewall. Maintaining that trailer tire PSI is critically important to towing safety.

### Do trailer tires need to be balanced?

Yes, they do need to be balanced. Most trailers don’t need the tires balanced, because most trailers are not on the road long enough to show the effects of out-of-balance tires, they fall apart long before it is evident. If you had a utillity trailer you may not want to balance the tires.