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When you’re towing serious weight, the Karrier ST225/75R15 Radial Trailer Tire is built for it. Rated Load Range E with a 10-ply rating, it carries up to 2,860 lbs at 80 psi. The “M” speed rating means it can safely handle 81 mph, giving you confidence for long hauls or heat-soaked highway runs. It meets Department of Transportation specs and stays stable even under full load.
This isn’t an old-school bias tire—it’s a true radial built for highway manners and long life. The cords are positioned at 90° to the direction of travel, so they flex smoothly without rubbing, reducing rolling resistance and heat buildup. Double steel belts and full nylon plies reinforce the structure for excellent traction, long tread life, and steady tracking at speed.
Wet road or blazing pavement, the Karrier’s computer-generated tread design and premium rubber compound hold traction and resist heat. The steel-belted radial carcass sheds heat efficiently and stays cooler on long drives. That means less risk of blowouts and more consistent performance trip after trip—exactly what you want when your trailer is loaded down.
Every Karrier ST225/75R15 comes with a 5-year limited warranty plus a 1-year worry-free guarantee that replaces the tire at no charge if it’s damaged within the first 12 months. It’s solid peace of mind for anyone who puts serious miles on their trailer and expects their tires to keep up without complaint.
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"
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Brooke M.
3/10/2025
I am so happy to hear that, Chris! I love the photo you sent in, too. It looks like the perfect set up for some fun memories and relaxation. Have you been able to take the Casita out this year?
Mike B.
4/2/2018
got about 5k miles on them now and they all are performing as they should
Robert A.
1/18/2020
The tires have preformed well. They have made several long trips with heavy weight with no problems. Wear has been slight after approximately 6000 miles. I will buy another set for my smaller trailer when they are needed.
GP
10/11/2020
Tires still working and wearing well have gone on 2 trips 6,000 miles total. Great tire at a great price
Terry M.
5/22/2021
The tires are doing great on my travel trailer, in two weeks we will be taking it out for another 2000 mile trip, Great tires!!
Malcolm
9/2/2020
Thankfully, it’s a spare and haven’t had to use it! Holding air and looks as new with no miles.
Scott
7/1/2020
still keeps air and works fine
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David
4/26/2026
One year later and the tires still look nearly new. I’ve hit a number of deep pot holes at 45 mph+ and no visible damage to the tires. The trailer still tracks the same as the first day they were installed. I will be buying these tires for my 25 foot travel trailer when the old ones were out.