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When you’re logging miles in hot weather or carrying heavy gear, this tire is made to hold steady. The Karrier ST175/80R13 Radial Trailer Tire handles up to 1,375 lbs at 50 psi and carries a speed rating of M (81 mph). It meets Department of Transportation specs, so you can tow at highway speeds knowing the tire is rated for the job.
Uneven wear and vibration are common with older tire designs, but this one’s 5-rib tread spreads the load evenly across the contact patch. The radial construction keeps rolling resistance low and heat buildup under control, giving you a smoother ride and longer tread life whether it’s dry pavement or wet roads.
Rain or shine, this tire holds traction where it counts. The silica-infused tread compound and sipe angles help move water away from the contact area to reduce hydroplaning. It’s engineered to stay stable in wet conditions while still offering solid control off pavement when things get slick or uneven.
Stuff happens on the road, but this tire’s coverage has your back. If it’s damaged in any way within the first 12 months, it’ll be replaced at no charge under its 1-year worry-free guarantee. Combined with a 5-year limited warranty, that’s real assurance for anyone putting serious miles behind them.
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:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews

Gwendolyn Y.
5/21/2025
I love the way you explained how the tires take on wet roads. Also, I wanted to ask if those were kennels on your trailer.



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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.