What Makes Trailer Tires Wear on the Inside Only and Can 175/80-13 be Replaced With 185/80-13


I have loadstar st175/80 D13 tires that seem to be wearing on the inside only???? Also could I go to a st185 tire?

Expert Reply:

There are a couple of things that can lead to the tires wearing on the inside only. Basically what is happening is the top of the tire is leaning in towards the trailer causing most of the weight to ride on the inside. This pretty much means the axle is bent, especially if both sides have the same problem. If it were just one side, there is a chance that is just the spindle that is bent. It will keep wearing on the inside until the issue is resolved and that could mean a new axle.

You could potentially go to a larger size tire. Both a 175/80-13 and 185/80-13 tire will fit on a 4-1/2, 5. or 5-1/2 inch wide by 13 inch diameter rim. However, the 185 will be taller and wider. You will have to measure the space around the existing tires to see if there is room for a larger size.

A 185/80-13 will be about 3/8 inches wider (0.394 inches wider) and about 5/8 inches taller (0.6304 inches taller). If you determine the larger size will fit, we have # AM1ST79. It is rated for 1,725 pounds at 65 psi.

I have included a link to our tire FAQ article for you.

expert reply by:
Michael H

Ask The Experts a Question >>

Products Referenced in This Question

Product Page this Question was Asked From

Similar Expert Q&A Pages

See More Q&A Expert Answers >>

About Us
photos and videos

Original Photos & Videos

Produced to make sure you know what you are getting and you get exactly what you need.


Installations Completed

To make sure products work and fit the way they are supposed to.

etrailer call center

Phone Calls & Emails Answered

1,125,924 phone calls and 1,350,587 emails to help find the right solution.

etrailer training

Average Hours of Product Training

We get to know our products firsthand so experts can better help you.

etrailer service

Years of Quality Customer Service

Assisting our neighbors and customers, face to face at the counter.

etrailer experts

Pages of Expert Information

Created to make sure you have all the answers to your questions, from real experts.