Which Load Range do I choose for my Trailer Tire?

Q:

I’ve noticed that the tires available on your web site have a B, C or D rating but I do not know what the current, and original, rating is of tires are that are on the trailer, only the size. Please advise how I should determine the best tire for my trailer.

A:

The load range refers to the load rating of the trailer tire. The higher the letter =  higher the load capacity. And usually more costly, as well.

Example:

Load range B is a 4 ply tire rated at 1,045

Load range C is a 6 ply tire rated at 1,120

Load range D is a 8 ply tire rated at 1,200

To help you determine which trailer tire load range you need, please read the following; Lets assume you have a single axle trailer, two tires (LR C). You would multiply the load capacity times two. 1,120 x 2 = 2240 lb you can haul on the trailer tires.

Please note, you must take your axle capacity into account as well. If you have a 2000 lb axle you should match your tires to the axle rating. Therefore a LR B (1045 x 2 = 2090 lb) would be sufficient and more economical as well.

That means the weight of the trailer, plus the weight of the load, is what your trailer tires and axle are rated to haul. Another example would be, if your axle is rated at 2,000 lb and your trailer weighs 600 lb, you would only be able to haul up to an additional 1400 lb.

Trailer Tires: Radial or Bias Ply?

Trailer tires should be replaced as soon as they begin to show wear and tear or about every four years, whichever comes first. If the tires on your boat trailer have a series of small cracks around the circumference of the tires, it may be due to dry rot, which can cause the tire to blow unexpectedly, resulting in being stuck on the side of the road as well as expensive repairs and towing fees.

It is important to buy only tires that are designed for use on a trailer. Trailers do not steer the same as a truck does and trailer tires are designed to account for the difference in steering, use in water and dry land as well as heavy loads on the trailer. There are basically two types of tires for a trailer:

· Radial trailer tires are durable, provide good traction, have less rolling resistance and improved stability.

· Bias Ply trailer tires are designed for extreme locations and driving conditions. These tires are made for excellent traction on all terrains including sand, gravel, snow and mud. However, non-radial bias ply tires only have a small amount of shock absorption, so they can be a bumpy ride.

Trailer tires with the largest diameter typically produce the least RPMs, which will make the tire more resistant to damage. It is recommended that you choose tires with a significant number of plies because they will make the tire more stable and longer lasting. It is important to choose the correct load rating for your trailer. The load rating can usually be found on a placard which is usually found towards the front of the trailer.

Should I balance my trailer tires and wheels?

Legally speaking, there is no reason to balance your trailer tires and wheels. After all, no one is allowed to ride in a trailer that is being towed. Legalities aside though, balancing your trailer tires and wheels can be one of the smartest things you do.

Trailer tire assemblies are not normally balanced in the factory, meaning that it’s quite possible that your trailer is in for a bumpy ride. Every pothole and crack in the road is going to shake it to its foundation. Naturally, that means that anything inside your trailer is also going to take a beating. What what you should be especially concerned about is how that bumpy ride is going to impact the trailer tires over the long haul.

Balancing your trailer tires with the wheels of your vehicle insures less vibration and a smoother ride. Tires wear more evenly and develop less worn, flat spots. Balancing also helps prevent wear and tear on bearings and extends the life of your tires.

Although the choice is ultimately yours, many drivers claim to feel a marked difference after their trailer tires have been balanced with their wheels. And doesn’t a smooth ride sound more pleasant?

Selecting The Correct Trailer Hitch

Determining the correct type of trailer hitch requires some investigation. You want to think about future items that you may want to tow as well to avoid having to make an additional purchase. It is always better to step it up a class rather than having to remove a trailer hitch to put a higher class on. Most people who put a trailer hitch on their vehicle install a class 3 trailer hitch. A class 3 trailer hitch will accommodate a wide variety of items.

Here are the classes of trailer hitches and what they can handle:

Class I: This is capable of towing up to 2,000 pound gross trailer weight with a 200 pound tongue weight. This class of trailer hitch will fit all vehicles.

Class II: This class is capable of towing up to 3,500 pound gross trailer weight and 350 pound tongue weight. This class of trailer hitch is geared for the mid-size car, SUVs, trucks and vans.

Class III: The class III trailer hitch can tow up to 5,000 pound gross trailer weight and 500 pound tongue weight. This class of trailer hitch operates well with an SUV, vans and mid-size pickups.

Class IV: The class IV trailer hitch can tow 12,000 gross trailer weight and 1,200 pound tongue weight. It is for use on a SUV, pickup or a van.

Class V: A class V trailer hitch can tow 24,000 pound gross trailer weight and 2,400 pound tongue weight. This trailer hitch is only suitable for pickup trucks.

Choose the right trailer hitch for your vehicle for convenience and safety. 

ST Trailer Tires vs. Passenger Tires

ST Trailer Tire Characteristics

ST trailer tires are made to support large loads. Their polyester cords are larger than those of other kinds of trailer tires. They are also stronger and more weather resistant. These tires have a maximum speed rating of 65 MPH and a life expectancy of 3 to 5 years.

ST Trailer Tires Differ Greatly from Passenger Tires

Special Trailer Service Tires or ST tires have been specifically designed and engineered for trailers and RV’s. These tires are constructed especially to carry heavy loads and to be pulled. Passenger tires are designed for traction. Traction moves your vehicle on the road allowing you to make turns. It also enables your vehicle to pull a trailer. Adding flex to the sidewall of tires makes a tire capable of ride and handling. Increased traction gives the driver better control while driving. Only trailers that have brakes have any need for traction.

Tires are specifically designed for certain weights. Passenger tires are rated to carry much lower weights then ST Trailer tires. It is always best to use tires appropriate for a vehicle and its payload.

Making the Right ST Trailer Tire Choice

Always purchase new ST Trailer tires. Used tires are not safe. Checking reviews will help you make a good choice. Radial tires are better because they are more fuel efficient, have low friction and are not affected by weather.