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Long hauls call for a tire that can handle the heat and the miles. The Rambler ST225/75R15 radial trailer tire is Load Range E with a 10-ply rating and carries up to 2,860 lbs at 80 psi. Its M speed rating—81 mph—means it’s built for steady highway towing without excess heat buildup. It meets DOT specs and exceeds FMVSS standards, so you can roll knowing it’s ready for real-world travel.
Heavy cargo and long miles put stress on a tire’s structure. This Rambler uses double steel belts and double polyester cords, reinforced by a nylon overlay that helps keep the tread firm and prevents separation. That construction reduces rolling resistance and keeps heat in check, extending tread life even when fully loaded.
The radial design keeps the cords at a 90-degree angle to the direction of travel, which lets the sidewalls flex while the tread stays flat on the road. Less internal friction means less wear and a smoother ride at highway speeds. It’s a simple bit of engineering that makes a big difference in long-distance stability and steering precision.
Tread bars molded into the Rambler make it easy to see when it’s time for replacement. The standard ribbed tread pattern gives consistent contact across the surface, ideal for straight tracking on pavement while still shedding water effectively in wet conditions. It’s practical peace of mind every time you check your tires.
1. Count the lug holes
Look at the wheel hub or the back of the wheel and count how many lug holes there are(also called bolt holes).
Common configurations include: 4-lug, 5-lug, 6-lug and 8 lug
2a. For even lug counts (4-lug, 6-lug, 8-lug)
Measure from the center of one lug hole directly across to the center of the hole opposite it.
Common configurations: 4 on 4", 6 on 5.5", 8 on 6.5"
2b. For odd lug counts (5-lug)
Measure from the center of one lug hole to the outer edge of the hole directly across (not center-to-center since there's no directly opposite hole).
Common configurations: 5 on 4.5" (most popular), 5 on 5", 5 on 4.75", 5 on 5.5"
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody, this is Jeff at etrailer.com. Today, we're gonna take a look at this Taskmaster Rambler ST225/75R15 Radio Trailer Tire in a load range E. Now this is a radial ply tire, so it's great for highway use. They do use the double steel belts and the double polyester cords, which combine for a nice long life. And they do also use a nylon tread firming belt overlay to help prevent tread separation. This is designed to fit on 15 inch diameter wheels.
The tire size, which will be stamped on the sidewall, right here, you'll see it's ST for special trailer, 225/75R15. The R lets you know that it is a radial design tire. Load range on this is load range E, which means it's a 10 ply rated tire. So the maximum load capacity is 2,860 pounds at 80 PSI. And now all the new trailer tires do have speed ratings on them and they stamp it on the sidewall by a letter designation.
And where that's at is right after the size. You'll see two numbers for the load index and then the letter M stamped there. That means it has an 81 mile per hour speed rating. Now, this tire does use a standard tread. You spin it this way and this standard tread has the solid continuous ribs and they have very few sipes or cuts in the rubber.
The sipes are usually what help with bad weather by breaking up any water that's underneath the tire. These tires, since they're designed for mainly use on trailers, they don't really require that level of traction that would be needed like, on a vehicle that has braking or steering. The tire is a ST tire, which is special trailer tire, has sturdy sidewalls so that it can handle heavy loads. It is created specifically for trailers. It's not intended for use on other vehicles.
And this tire does meet the DOT Department of Transportation specification and it will exceed your federal motor vehicle safety standards. But that's gonna do it for the review on this Taskmaster Rambler ST225-75R15 radial trailer tire, and a load range E.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Brooke M.
5/21/2025
Happy campers is the goal! Thanks for sharing the photo :) Trailer looks ready to go! Any upcoming plans for a trip?
Info for this part was:
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Claire H.
9/1/2026
Glad to hear they’ve been working well and holding air without affecting the ride! No worries about the photos—we appreciate you sharing the one you could. Have you noticed any change in how the camper handles when driving?