How To Choose RV Trailer Tires
*It is crucial that you consult your owners manual first for the right RV trailer tire specifications, followed by the steps outlined here*
Choosing the right tires for your trailer will depend on the size/weight of the RV trailer when fully loaded. Weigh your fully loaded RV trailer at a weight station. This is very important because more often than not, the owners manual will specify a weight range that is actually lower than required as they have not factored in a fully loaded trailer. By doing some simple maths we can determine the load range required by the tires for your trailer.
Take the total weight of your RV trailer and divide by 2 for a single axle or 4 for double axles. For example:
RV weight: 8000 lbs
1 axle: 8000/2 = 4000. The load of each tire needs to support 4000 lbs.
2 axles: 8000/4 = 2000. The load of each tire needs to support 2000 lbs.
RV trailer tires are categorized by 4 load ranges, classified by the letters B C D and E. With this in mind we can figure out what tire size and inflation pressure is required for each trailer tire. We can do this by looking at Goodyear’s RV Inflation Table. To read the table, find the load limit that is required by your RV trailer tires, either single tire or double tire, rounded up. We are only looking for load ranges of B C D or E (bolded in the table). So if our load limit for each tire is 2000 lbs on a single wheel configuration, we can determine that we require a tire size of ST225/75R15.
And that’s it!
What the Letters mean
Special Trailer (ST): ST tires are designed for RV trailers in mind. ST tires have a more rigid sidewall compared to regular tires, but provide flexibility as well. They improve your cornering and backing when compared to regular car tires and are developed especially for long periods of towing.
Light Truck (LT): LT tires will be required when you require a greater load range that ST tires cannot provide. Consult a professional tire dealer for more information about LT tires. Like the ST tire, they have stiffer sidewalls compared to regular tires.