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This ST225/75R15 radial tire is made for serious hauling. With a 10-ply rating and a maximum load of 2,830 lbs at 80 psi, it’s ready for long highway runs or heavy-duty towing. The M (81 mph) speed rating and double steel belt construction give it stability and endurance for extended travel. It meets DOT specifications and exceeds FMVSS standards, so you can trust it mile after mile.
You don’t need to make an extra stop before hitting the road. Taskmaster match mounts and balances each assembly using laser-guided equipment that aligns the lightest part of the tire with the heaviest part of the wheel. That process minimizes vibration, helps reduce tread wear, and gives you a smoother ride the moment it’s installed.
The black mod-style steel wheel isn’t just tough—it’s designed to stay that way. It gets an e-coat primer and zinc phosphate pre-treatment before a durable acrylic enamel finish is applied. This finish outperforms powder coat options when it comes to resisting chips from road debris or curb contact. It’s been proven in over 1,000 hours of salt spray testing, so it stands up to moisture and harsh environments.
The Provider radial tread uses automotive-style ribs with breaks and sipes that channel water away from the contact patch. That means better traction on wet, snowy, or icy roads compared to traditional solid-rib trailer treads. Underneath, double polyester cords and double steel belts—plus a nylon overlay—add strength and help prevent tread separation for long tire life.
Along with durable construction, this tire-and-wheel combo comes with a 2-year limited warranty that includes Platinum Plus roadside assistance. If you get a flat, a technician will come change it out with your inflated spare—available 24/7 for two years. It’s added assurance that keeps you rolling when plans don’t go as expected.
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.
Hi everybody, Andy here with etrailer.com. Let's take a look together at this Provider ST225/75R15 Load Range E radial trailer tire with this 15 inch Vesper black mod wheel with a six on five and a half inch bolt pattern. Now this tire and wheel assembly is going to be great for your stock trailers, your utility trailers and campers. This special trailer tire or ST tire has sturdy sidewalls so that it can handle heavy loads. And this is created specifically for trailers and not intended for use on other vehicles. Now this assembly features the tire match mounted and balanced to this wheel for ride comfort and durability.
The match mounting of tires and wheels is a process in which the tire installation position on the wheel is specifically selected to help minimize the final force of imbalance. The method of match mounting involves aligning the tire's lightest spot with the wheel's heaviest spot to eliminate most of that radial force that can cause tire and suspension wear. Then a final balance is done by applying weights to specific spots on the wheel as you can see here on this assembly. That's gonna help eliminate any chance of uneven wear or vibration. So this radial tire is constructed with double steel belts and double polyester cords for a long life.
As you know, radial ply tires are designed for trailers that are towed on the highway and the nylon tread firming belt overlays are gonna help prevent tread separation. This tire has been bake tested to ensure that the rubber holds over time. And then the automotive grade tread has sipes that are gonna channel water away from the tire to improve traction during wet, snowy, or icy conditions. So as I stated at the beginning of our time together, and as we have stamped here on our tire, this is an ST225/75R15. The section width is 8.78 inches.
The outer diameter is 28.31 inches. This is a load range E tire, meaning it has a 10 ply rating and the maximum load is 2,830 pounds at 80 psi. And this has a speed rating of M, indicating a maximum speed of 81 miles per hour. Now this Vesper steel wheel with this mod design that you see here is sturdy, it's corrosion resistant. The black acrylic enamel finish is going to resist chipping and other damage better than powder coat finishes.
This finish is applied after a zinc phosphate pre-treatment and it covers an E-coat primer layer. So this is going to give you excellent corrosion resistance with a salt spray rating of more than 1,000 hours. The beveled stud holes are gonna help keep this wheel securely in place on your trailer hub, eliminating the need for constant re-tightening of the lug nuts. The dimensions of our wheel, looking at the diameter first measuring bead-seat-to-bead-seat where the tire actually sits on the wheel itself, it's gonna be 15 inches in diameter and the width is gonna be six inches wide and our bolt pattern is six on five and a half inches. And in case you don't know, the first number in the bolt pattern is the number of holes, and the second number is the diameter in inches of the circle on which the bolt holes sit. So to determine the bolt circle diameter on wheels with an even number of bolt holes as we have here, you're gonna simply measure from the center of one bolt hole to the center of the other bolt hole directly across from it. The wheel capacity is 3,080 pounds. The wheel stud size is half an inch by twenty, the center cap is sold separately, but if you pick one up, you just wanna make sure that it fits a pilot diameter of 4.25 inches. Now this assembly does meet the Department of Transportation specifications and it does exceed the Federal Motor Vehicle Safety Standards. And one final note, this tire and wheel assembly does come with a platinum plus warranty that includes complimentary roadside assistance for two years. So if your trailer has a flat tire, you simply call their helpline and a technician will come and change out the flat tire with your existing inflated spare tire. And that service is available to you 24 hours a day, seven days a week. And in addition to the roadside assistance, this warranty will also include other benefits. Well, I think that's gonna wrap up our look today. I do hope that our time together was helpful for you. Again, my name is Andy. Thank you for joining me.
Ratings & Reviews
Gwendolyn Y.
3/5/2026
The new wheels look great on your trailer, Mike! When's the next trip to the lake?
Christopher H.
8/14/2026
Agreed Staci these look great! Sounds like it was a smooth swap.
Nick S.
1/5/2026
That is great to hear, and it looks awesome on the trailer! What are you mainly using that trailer for?
Barb O.
4/1/2026
All the tirerims I’ve purchased from etrailer have performed well. Using as a spare for my tear trailer.
Heather A.
4/1/2026
Kate F.
3/11/2026
I am shocked to hear they broke off Larry. I have never heard of an issue like this before. I would like to reach out to the manufacturer but need to know a little more information. What kind of trailer did these go on, and what is the weight?
Kenneth
4/2/2026
I bought this as a spare for the camper and forgot about it until I needed it two months later. Its been on the ground for 9 months with no problems. Again, its something I can forget about until my pressure check before a trip.
James D.
6/12/2026
Thanks for the review William! We're glad the tires arrived as promised and that you're happy with how they look. A restored '94 Starcraft sounds like a fun project, we'd love to see it when you get it on the road. Hope the installation goes smoothly and we appreciate you choosing etrailer!
Louis
12/15/2025
I purchased these tires for the higher speed rating 81 compared to the tires I replaced that were only rated to 65. Which is below typical interstate speeds. I year later the tires and rims are fine.
Abe
8/26/2026
I sold it to someone else
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Victoria H.
4/12/2025
Thanks Michael, we enjoy being your go-to! We'll be here to help whenever your ready.