Trailer tires are built differently from the ones on the vehicle towing them — ST-rated for a stiffer sidewall under a stationary, unbalanced load, not for steering or power. Atlanta Tire Shop stocks and mounts ST tires for utility, boat, camper, and car-hauler trailers, checking tire age as closely as tread, since a trailer tire can crack from age before it visibly wears out.
A trailer tire does a completely different job than the tires on the truck pulling it — it carries a fixed, often uneven load and never drives or steers, which is why passenger and light-truck tires aren't rated for the role. Atlanta Tire Shop, at 2225 Moreland Ave SE, stocks ST-rated tires sized for utility trailers, boat trailers, campers, and car haulers, built with a stiffer sidewall to handle that kind of static weight.
Tread wear is only half the inspection. A trailer that sits in a driveway or storage lot for months at a time can develop sidewall cracking well before the tread wears down, since the tire ages from sun and weight exposure whether or not it's actually rolling.
Why do trailer tires need a different rating than truck tires?
An ST tire's sidewall is built stiffer than an LT or passenger tire because a trailer's load sits on the axle without a vehicle's suspension or steering geometry to help distribute it. Swapping in a passenger or light-truck tire in place of an ST-rated one is a common shortcut that shows up as sidewall failure — usually on the highway, not in the driveway where the swap happened.
Does the spare matter as much as the tires that are mounted?
On a tandem-axle trailer, a mismatched tire — a different size, a different age, or a noticeably different tread depth from its pair — throws off how evenly the load sits across both tires on that axle, so a spare that doesn't match closely is more than just a backup problem.
A trailer that only comes out a few weekends a year still benefits from a check before each trip. Age-related cracking doesn't announce itself as a slow leak — it shows up as a blowout at highway speed.
Can I just put regular truck tires on my trailer?
Not safely for regular towing — trailer axles need the stiffer ST-rated sidewall built for a static, unbalanced load, not the tread and flex built into a truck or passenger tire. Swapping in a non-ST tire is a common cause of sidewall failure at highway speed.
How do I know if my trailer tires are too old to trust, even with good tread?
Check the sidewall for fine cracking, especially near the rim — a trailer that sits between trips ages from sun and weight exposure regardless of mileage. If the tread looks fine but the sidewall shows cracks, it's due for replacement anyway.
Do both tires on the same axle need to match?
Yes — different sizes or noticeably different tread depths on the same axle change how the load splits between them, including the spare if it ends up mounted mid-trip. Matching the pair is worth doing even when only one tire actually failed.
What kinds of trailers do you carry tires for?
Utility trailers, boat trailers, campers, and car haulers are the regular mix, stocked in ST-rated sizes at 2225 Moreland Ave SE rather than special-ordered each time. Call (470) 264-4465 to check a specific size.