When you’re towing serious weight or covering long distances, the Tamarack ST225/75R15 Radial Trailer Tire is built to hold steady. It’s rated Load Range E with a 10-ply rating and handles up to 2,830 lbs at 80 psi. The M speed rating (81 mph) and reinforced sidewalls keep you rolling safely at highway speeds without worrying about heat or blowouts.
Flat on the side of the road? This tire includes complimentary roadside assistance for 2 years. One call brings help 24 hours a day, 7 days a week, 365 days a year across the United States, Canada, and Puerto Rico. It’s an extra layer of confidence built right into the tire so you can focus on getting where you’re going.
The Tamarack radial construction uses double steel belts and double polyester plies wrapped in a nylon overlay. That tough build resists tread separation and heat buildup for long tread life and reliable performance mile after mile. The sturdy Special Trailer (ST) design gives your trailer the strength it needs under heavy load without extra flex or sway.
Radial cords run at a 90-degree angle across the tire width, reducing friction between layers and lowering rolling resistance. That means less heat buildup, steadier tracking, and improved steering at higher speeds compared to bias tires. It’s an efficient setup that keeps your trailer tracking straight and smooth on every haul.
Keeping tabs on tire life is easy thanks to the integrated Tread Wear Indicator (TWI). A quick glance tells you when it’s time for replacement, helping you stay ahead of maintenance and avoid surprises on the road. The tire also carries a 5-year limited warranty for added peace of mind.
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 quick look together at this Tamarack ST 225 75 R15 radial trailer tire. Now, if you've ever pulled a trailer, you know that your tires aren't just along for the ride. They're carrying the weight of your trip. That's why this Tamarack ST 225 75 R15 radial trailer tire is built tough, with reinforced sidewalls and smart engineering, to keep you rolling safely and smoothly down the highway. Now this is built for the road.
You're gonna be able to use this safely at highway speeds. This has a speed rating of M, which indicates a maximum speed up to 81 miles per hour. So you're gonna be able to tow with confidence and avoid blowouts. And this has heavy duty load support. This tire can carry up to 2,830 pounds at 80 PSI.
So this is gonna be perfect for those heavier, single-axle trailers. And it has a strong construction with the load range of E. That means that this tire has a 10 ply rating. This tire is designed to handle demanding hauls. So this is gonna be durable by design.
It has double steel belts, double polyester plies, and nylon overlays that are going to work together for strength and long tread life. This is built as a ST tire, meaning it's a special trailer tire. So this is not a design for automobiles, trucks, or things like that. This is specifically designed for your trailer, so it's gonna be tough enough to manage the unique stresses of trailer use. So it's gonna be pretty easy maintenance.
We do have tread wear indicators on the tire to make it simple to know when it's time for replacement. This is going to fit your 15 inch by 5 inch and 15 inch by 6 inch wheels. The section width is going to be 8.78 inches. And with the outer diameter, when fully inflated, is gonna be 28.3 inches. So with its rugged construction and highway speed rating, this radial trailer tire is going to be just what you need for a safer, more reliable towing. If you have any questions about this tire or any of the other products that we carry here at etrailer.com, don't hesitate to reach back out to us because ultimately, we do wanna make sure that you're getting exactly what you want and need. Well, I think it's gonna wrap up our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
It was the exact same tire I needed due to a blow out. It arrived quickly, in perfect condition. I have ordered multiple times from trailer, all products as advertised. Will recommend them, anytime.
Worst tires ever!!!! Many blow outs and wear problems. Broken belts in new tires. These tires have destroyed many a fender well!!!
Received excellent service! Needed to get my travel trailer tire replaced in order to go on trip soon. Did not expect to get shipment so quick. Really appreciated it.
Had a blowout while driving my enclosed trailer and this tire is the Perfect replacement tire
I called around and could no one had this in stock but could order it with no idea when it would arrive. The dealer I bought the camper from suggested going to etrailer.com and they not only had it but sent it the same day and it show up 2days later. You can't beat that! I have bought other things from etrailer.com and always great to work with.
I rate 5 stars for the following reasons: (a) etrailer had the best price for my trailer tires, (b) the order was delivered by UPS in 3 days for free, and (c) I was kept informed by email of the progress of my order.
I needed a new tire for my travel trailer and retailer provided several choices. The ordering process was very easy and the tire was delivered in less than a week. I will definitely use etrailer again.
I had a blowout on my way home from Florida back to Texas on my travel trailer. Half way home and was glad had a spare. When I got back I called the local dealership and they referred me to etrailer.com because they couldn’t get it in stock from their supplier. Looked up on internet and found the exact match.
Ordered on Friday and arrived on Wednesday, even with a 3 day holiday. Easy process to order. They had in stock.
Happy with order.
My review is not going to be based on the tire itself due to I ordered this it to replace the tire I blew. This review is going to be on etrailer.
This is the 2nd time I have ordered a product with etrailer. They are very professional and very knowledgeable about the products that they sell. They keep you informed about item being shipped. I will keep ordering from them.
etrailer was the only place I could find to order a tire that matched the other three tires on my RV. Ordering was easy and the tire was delivered when they said it would be. The tire was delivered in a cardboard box with handles making it easy to move around. If I ever need another tire I would definitely use etrailer.com again.
I bought this tire to replace exactly the one that was on the trailer. I've found different manufacturers tires are not exactly the same size even though the numbers match. I had one tire on my dump trailer locking up when I applied the brakes. It was a different manufacturer and when comparing it was actually about a 1/2" smaller height wise. This is the exact tire that the rest of the tires on my trailer are and it has been working great. It is just a tire. Not to much t report on.
Great service , fast shipping
Shipping was lighting fast and arrived in one piece ! Great communication throughout the entire order process.
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