For most tires on motorhomes, the maximum speed limit is 75 mph. For fifth-wheels and travel trailers, the speed rating could be as low as 60 to 65 mph. If you exceed the speed rating of a tire, it will not explode; however, maintaining a higher speed for a long distance can cause heat buildup. This can damage the tire.
Factors that can affect a tire’s speed rating include tire inflation, vehicle alignment, duration that the tire is driven in excess of the rated speed and driving conditions. If a tire has been damaged or run while under-inflated, overloaded or has been repaired, the manufacturer speed ratings will not apply and the speed rating will be lower. The best way to find the speed limit for your tires is to use the tire manufacturer’s load inflation charts. Not only will these charts tell you the speed rating for the tire, it will also show you the inflation pressure for the load that the tires are carrying.