Trailer peace of mind, By the staff of Dirt Wheels: 

The tread pattern doesn’t look aggressive, but we can’t fault the traction on pavement or dirt.

One of the Dirt Wheels editors has a 30-foot bumper-pull utility trailer. It is not as weighty as a heavy equipment trailer, but it’s a monster. It looks a mile long, but gets shorter when you drive UTVs onto the deck.

When we first got it, it needed mods to be safe with a full load of cars on it. One of those mods was trailer tires with a higher load range. For 15-inch wheels, E-rated tires were the heaviest we could find.

We bought new tires for it, but none of the tires lasted over six months. For a short stretch we had a tire come apart every time we drove the trailer. Then we started with four new Carlisle Radial Trail HD trailer-specific tires. Ours are ST225/75R15 tires.

Mounted on rims, the tires are 8.8 inches wide and are just over 28 inches tall. They carry a maximum load at 80 psi, and the maximum speed rating is 81 mph (not that it matters to us in California). California restricts all trailers to 55 mph, but even in other states we keep the trailer moving less than 65 mph.


Our trailer is subjected to heavy use. We carry less than 5500 pounds in machines on the trailer deck and perhaps another 500 pounds for the toolbox where we carry jacks, tie-downs and wheel chocks. Each Carlisle trailer tire is rated for 2830 pounds for a combined total of 11,320 pounds. We are always under that weight, but we drive on dirt and rocks, and the right two lanes on many California freeways where trailers are restricted to are brutally rough with expansion joints and the broken edges of concrete potholes.

We have a year of frequent heavy-duty hauling with the Radial Trail HD tires. There have been no failures, and they look brand new. We can’t even tell you what a load it is off our minds having safe, reliable tires on our trailer. We keep up on the air pressure. If the trailer is left parked long enough, the tires do drop in air pressure, but that is normal.


We called a couple of local tire stores, including the national Pep Boys chain. The tires were priced between $94 and $96 each, though they will be higher with taxes and fees, and installation may be an additional cost as well.

The Carlisle Radial Trail HD tires have been great, have a reasonable price, and ride smoothly and quietly on the road. We would definitely buy them again.

Go to to see the full line of Carlisle tires and wheels.

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