Uses a multi-body ply rubber compound for longer life. Tread pattern is designed to dissipate heat buildup during long road trips. One of the few trailer tires rated for higher load capacities without extended wear. Variable pitch design makes for a quiet ride.
Tire can require extra assistance to properly install on a rim.
Designed specifically for trailers. Central grooves in the tread help improve overall highway and road performance. All-weather design uses a durable rubber that lasts for many thousands of miles. Easy to put on to most trailer rims in a pinch.
Thin rubber makes the tire susceptible to flats on the road.
Designed to be used in both wet and dry conditions, making it good for a variety of weather and terrain environments. Deep treads provide better grip than typical trailer tires. Simple design with black wall. Comes in a variety of sizes.
No rim included with the tire.
Combo pack includes a basic road tire that provides decent traction and performance. Rim uses a five-hole pattern common with most modern trailers. Wheel set includes two individual tires and rims. 1,360-pound tire weight rating.
Rims may not be compatible with all trailer types.
Tires are designed to handle such variables as traveling at different speeds, safely navigating different terrains and road conditions, and carrying different size loads. Trailers, which carry heavy loads, need different tires than the ones on your passenger car.
A good trailer tire, or ST tire, has a thick construction and a high speed rating. But with so many different trailer tires available, how do you find the right one for your trailer? If you’re feeling overwhelmed, we’re here to help.
At BestReviews, we simplify shopping with our handy shopping guides, which are packed with key information and helpful tips. For everything you need to know about trailer tires before you buy, just keep reading.
Trailer tires have a different function than other types of tires. With passenger cars and light trucks, you need tires with good traction to start, stop, and steer the vehicle without slipping. Another main concern with passenger car tires is comfort. The sidewalls of passenger tires are more flexible to absorb the bumps of the road.
A trailer tire, on the other hand, doesn’t need as much tread for traction since it is not responsible for starting or stopping the vehicle. With less traction, there is more room for reinforcing layers like plies and belts. This results in stiffer sidewalls, which are less effective at absorbing any bumps. The additional structural material allows trailer tires to carry a heavier load.
A durable and innovative ST tire
The Trailer King II ST Radial Tire is an all-season trailer tire built for durability. Since friction and heat buildup are the enemy of tires, one of this trailer tire’s most exciting features is its ability to dissipate heat. Priced at just under $50 and with eight-ply construction, this trailer tire is a high-quality steal.
Tires are identified by a sequence of letters and numbers found on their sidewalls. Use this code to match new trailer tires to your trailer.
The type of tire is indicated by the first letter in the identifying code: P for passenger car, LT for light truck, or ST for special trailer. For trailer tires, look for tires that start with ST. For example, the code ST205/75R15 D/8 would indicate a specialty tire.
Listed next is the width of the tire in millimeters. If the code is ST205/75R15 D/8, the width of the tire is 205 mm.
The number following the slash indicates the tire’s height. This number is not a measurement, however. It’s the percentage of the tire’s width. In our example, ST205/75R15 D/8, the height of the tire is 75% of its width of 205 mm.
The tire load capacity on a single axle is cumulative. For example, if you have two trailer tires rated for 1,520 pounds on a single axle, together they can support a 3,040-pound load.
The next letter will either be R or D. These letters let you know how the tire is constructed on the inside. R stands for radial, and D stands for diagonal bias. In our example, ST205/75R15 D/8, we have a radial tire.
Radial tires: Radial tires have rubber-coated steel cables running perpendicular across the tire. They are better for long distances because they stay cooler and provide less rolling resistance, which means they help with fuel efficiency. They also resist developing flat spots better than diagonal bias tires, and they have a longer tread life of about 40,000 miles.
The last number in the sequence before the space is the diameter of the wheel in inches. In our example, ST205/75R15 D/8, the wheel is 15 inches in diameter.
The load range is listed after the space. It’s a letter and number that indicates how many plies the tire has. For instance, load range B has four plies, load range C has six plies, load range D has eight plies, and load range E has 10 plies. This number has nothing to do with tire size. It tells you the maximum tire pressure and weight each tire can carry. Two tires can be the exact same size, but the tire with more plies will be able to haul a heavier load. In our example, ST205/75R15 D/8, the tire has a D load range or eight plies.
Just because the gross trailer weight (the weight of a fully loaded trailer) is below the recommended limit, that doesn’t necessarily mean your trailer tires and vehicle are safe. The load in a trailer must be properly distributed front to back and side to side to avoid unintentional damage to your trailer tires.
If you’re trailer has been sitting for more than a month, always check the pressure in your trailer tires before hitting the road. Use a tire pressure gauge because it can be impossible to visually determine if a radial tire is under-inflated.
While older trailer tires were only rated to travel at a maximum speed of 65 miles per hour for sustained periods, many newer trailer tires are designed and manufactured to travel at higher speeds. A new trailer tire will have a letter on its sidewall that indicates its speed rating: M for 81 mph, L for 75 mph, and J for 62 mph. This rating is for normal inflation and load conditions and good road conditions. Traveling at a higher speed than indicated may cause heat to build up, which can lead to sudden tire failure.
Trailer tires are designed to function best with the proper inflation. Under-inflated tires will create more friction, causing overheating. This can lead to premature wear and a possible blowout. Over inflation will cause the tires to wear more quickly along the center treads.
A set of ST tires with a high speed rating
The Kenda Loadstar Dexstar Two-Pack Trailer Wheel and Tire includes two pre-mounted 13-inch trailer tires and wheels. These six-ply diagonal bias tires can accommodate up to 1,360 pounds each, and they are able to handle speeds of up to 81 mph. Besides the great price, we love that these trailer tires come with a two-year warranty.
Locate the date of manufacture on the sidewall of your trailer tire. It will look something like this: DOT K3AP 1218. The last four numbers tell you the week and year the tire was manufactured. In our example, DOT K3AP 1218, the tire was made the twelfth week of 2018.
Trailer tires are unique in their tread wear. Since many trailer tires sit most of the year, the tread may look exceptional. Even after a number of years, the tires may appear new. However, since tires naturally break down over time, regardless of the tread wear, it is important to know when they were made. Most manufacturers recommend replacing trailer tires at least every five years, no matter how much tread is left.
Radial trailer tires range in price from just under $50 to about $150. Diagonal bias trailer tires range in price from just under $40 to about $120.
Trailer tires need to be replaced in sets. When you replace one tire on an axle, the other tire on that axle should be replaced as well.
Q. When should I check the tire pressure in my trailer tires?
A. Not only should you visually inspect your trailer tires before every trip, but you should also check the pressure in each tire, too, by using a tire pressure gauge. For the most accurate reading, check the pressure when the tires are completely cool.
Q. My trailer tires are new. That means they won’t leak, right?
A. Unfortunately, even brand-new trailer tires can lose air. Heat, cold, heavy loads, and long driving distances can all contribute to your tires losing air.
Q. What is a flat spot?
A. A flat spot is an area of your tire that has become flat due to the weight of the vehicle pressing down on the tire for an extended period of time. This typically occurs when the parking surface is cold. Flat spots can easily happen with trailer tires because trailers tend to sit for extended periods of time. In most cases, these flat spots will round out again after the tire has heated up from traveling. However, a flat spot can be permanent. A permanent flat spot could be a sign of damaging moisture buildup, especially if the trailer is parked in the grass.
BestReviews wants to be better. Please take our 3-minute survey,
and give us feedback about your visit today.