One of the most important and often overlooked items on an towable RV are the tires. Most travel trailer or 5th wheel tires are barely adequate for the load they are carrying as many manufacturers use the cheapest tires possible to save money.
To ensure your tires are up to the task of safely supporting your expensive home on wheels, follow these steps for selecting and maintaining your RV tires.
The first step is to look for special trailer tires, which are designated with an ST in front of a series of numbers on the sidewall. These are designed with RV trailers in mind. They have stiffer sidewalls than a passenger (P) or light truck (LT) tire, are more flexible when cornering and backing, and are designed for extended, non-stop towing. However, LT tires are can be substituted for ST tires if greater load carrying capacity is required.