Ultimate buying guide for RV tires

The decision to purchase tires for an RV can be more complicated than buying a new set of wheels for your day-to-day driver. RV tires must bear significantly more weight than those of a passenger vehicle, and as such, motorhomes use tires specifically designed for this type of transportation.

In this guide, we’ll break down RV tire types, how to choose the right one for your RV, and tips for knowing when it’s time for a replacement.

Choosing the right RV tires

Because your RV uses different tires than your passenger vehicle, it's important to check with your RV manufacturer’s tire specifications, which are based on the vehicle’s design and performance needs. Manufacturers will recommend different tire types based on the class of your motorhome — Class A, B, or C — and your RV's gross vehicle weight rating (GVWR).

GVWR is the maximum amount of weight that your RV or trailer can bear when it is fully loaded with cargo, dry goods, all fluids, and passengers, plus the RV's weight. The tire you choose must have a Gross Vehicle Weight Rating (GVWR) higher than this total. If you are unsure of your GVWR, you can always have your trailer or RV weighed at a local CAT scale, often located at truck stops.

Now, let's take a look at the different styles of tires that you can compare when shopping for RV tires.

Special trailer (ST) vs. light truck (LT) tires

Special trailer (ST) tires

ST, or "special trailer" tires, are specifically designed for use with travel trailers, as they are built to accommodate the added weight of these trailers. These more 'towable' tires were specifically designed to perform well on trailers and fifth wheels. ST tires are designed to provide a smooth, low-resistance ride for trailers being pulled by a lead vehicle.

Because no power will be delivered to the tires, the tire design is less focused on traction and more on ensuring the travel trailer has ample support for the weight of everything inside. These specially engineered tires feature a design that uses layers of polyester cords and steel belts for added strength and support. Wires offer extreme durability and strength, which can aid in the stability of the trailer and decrease the chances of sway.

Good for: Fifth wheels, travel trailers, pop-up campers

Light truck (LT) tires

LT, or "light truck" tires, have thicker sidewalls and a heavier-duty build than normal passenger tires, which are designed to flex and bend for a more comfortable ride. LT tires will maintain their shape to handle the increased heat of carrying a heavy load while adding comfort to the ride.

Many Class B and C RVs now come factory-equipped with LT tires designed for long-distance travel and better traction in wet conditions. LT tires are manufactured to produce more traction than ST tires and are generally the tire of choice under an axle that will be delivering power to the road, such as an RV.

Good for: Class A, Class B, and Class C RVs

Radial tires vs. bias tires

Along with deciding between ST and LT tires, you'll have the option of choosing how your tire was engineered.

Radial tires

Radial tires have steel belts that are manufactured to run at a 90-degree angle along the width of the tire. This engineering strategy allows the sidewall and treads to function independently. Functioning independently allows the tire to increase fuel efficiency, have better traction, and run at a cooler temperature than bias tires.

Bias tires

A bias tire is designed with multiple rubber plies crisscrossing each other at a 30-45 degree angle. This allows the entire tire to flex easily, allowing a smooth ride. They are generally less expensive and have thicker sidewalls, which make them more resistant to sidewall punctures. Most new RVs are equipped with radial tires by default due to their durability and performance benefits.

RV tire maintenance and tips

There is an adage that states that "anything between you and the ground should be well taken care of." When it comes to the wheels beneath your RV, this is particularly true. Having a tire fail while traveling can cause damage to the undercarriage of your RV or trailer, strike other vehicles on the road, and even cause you to lose control of your RV. A good set of tires is essential for your safety while traveling.

When inspecting your tires, pay careful attention to the following:

• Cracking or dry rotting: Even the smallest hairline cracks are a reason for concern. Tires showing this damage should be replaced immediately.
• Bulges and uneven wear: Any imbalance in your RV's tires can cause vibrations, increasing the chance of a blowout. Rotating your tires every 5,000 miles can help promote even wear and extend the life of your tires.
• Tire size:  Ensuring that the tires on your RV are the right size for your rig is important for steering, powertrain reliability, and even wear. Check your RV manufacturer's recommendation to ensure that your tires are the right size.
  
• Tire tread depth: Use a tire depth gauge to check the tread on your tires. Ideally, tires should measure above 4/32".
• Tire pressure: Tire pressure guides are often found in the door jam of the driver's side of your RV and should be followed precisely. Before you hit the road, measure the cold tire pressure to ensure it matches the manufacturer's recommendation.
• Tire weight load: Checking the weight of your RV or trailer against the weight load of your tire is essential for safe travel. If you have added significant weight to your RV, you can use a CAT scale to weigh your RV to ensure you're not exceeding the recommended weight limit for those tires.
• Age: Replace tires that are over 5 years old. Older tires increase the chances of flats and blowouts.

One of the easiest and most efficient ways to protect your tires is to do a visual and pressure check monthly, or more if you travel frequently. Clearing any stones or other debris that gets lodged in the treads can prevent damage to your tires while in motion. If you notice that your tires appear to be damaged, take your RV into the shop for a professional inspection right away.

Visit a Transwest Service Center

Whether you need to replace a set of tires on your RV or have a professional take a look at your tires to make sure they are the right match for your needs, we're here to help. 

Stop by a Transwest RV service center to learn more about keeping your RV tires in quality condition. If you need tires urgently, contact our Mobile RV Services.