Recommendations for Larger Tires on Jayco Pop-Up Camper

Question

Question:

I have a Jayco pop up that currently has 20.5x8-10 LRC tires with 4 on 4 wheels. I would like to go with a 13 inch radial because they wont run as hot and overheat and wheel with the highest load range possible, I think the problem is the pressure rating on the wheel itself, what can you recommend? I have a minimum of 2 inches between my current tires and my wheel wells with the possibility of modifications to accept a larger tire, would like at least load range D. Thanks

asked by: John H

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Expert Reply:

One of the most important things to do with trailer tires is to make sure that you are running the maximum psi that is listed on the tire. This will allow that tire to handle the maximum load capacity that it is rated for.

The overall diameter on your 20.5 x 8 -10 tires is 20-1/2 inches and if it is a load range C tire, the load capacity would be 1,100 lbs at 50 psi.

The smallest 13 inch trailer tire size is 175/80-13 and it has an overall diameter of 24.1. That will be a difference of 3-1/2 inches taller. If you were to use this size I would recommend the Loadstar ST175/80D13 Bias Trailer Tire with White Wheel - 4 on 4 - Load Range C, part # AM3S120. This tire will have a maximum load of 1,360 lbs at 50 psi. I would not have a load range D tire in this size mounted on a wheel.

I would recommend looking at the Kenda ST145R12 Radial Trailer Tire with Aluminum Wheel - 4 on 4 - Load Range D, part # AM31208. This tire will have an overall diameter of 21.3 inches and will keep you within the 2 inch height difference from your 10 inch tire size. It is a load range D tire with a maximum load of 1,220 lbs at 65 psi.

I am including links to FAQ pages on trailer tire information.

expert reply by: Jeff D

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Answer 1

If your leaf springs are mounted below your axle you could use an axle flip kit (over under kit) to get additional ground clearance. This is the best way to gain ground clearance and should work well for you. If you have 3 inch axles you would want…

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Answer 2

In order to be able to place bigger wheels and tires on your camper, the first thing needed is the bolt pattern you have on the existing wheels you wish to replace. The tire/wheel combos we offer for that tire size either have a 4 on 4 or 5 on…

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Answer 3

You do indeed have a 12 inch rim. When you measure the diameter of the wheel, you'll need to measure the diameter of he wheel where the tire bead meets the wheel. I've provided you a cutaway diagram of a wheel showing where the…

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Answer 4

The 205/65-10 and the 20.5 x 8-10 would be very close in size. Assuming that 20.5 is the diameter of the tire and 8 is the width. The Kenda 205/65-10 Bias Trailer Tire with 10 inch White Wheel, #AM3H390, for example, is 8.3 inches wide with a…

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Answer 5

Here is a list of the threaded and tapered wheel bolts we have. These are all 4-packs. If you do not have a thread diameter and count tool you can take one of your wheel bolts to a local hardware store to measure. 1/2" x 1", 60 Degree…

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Answer 6

We do indeed have wheel/tire combos that would provide a 175/80-13 inch tire on a white powder coated steel wheel with a 4 lug on 4 inch bolt circle. However, after closely examining the photo you kindly provided, I saw that you have what's…

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Answer 7

As your 20.5x8.0-10 tires on your 1976 Apache Ramada are no longer available most will change over to the Loadstar K399 Bias Trailer Tire - 205/65-10 #AM1HP54 as the closest size available at 8.3" wide and 20.6" in diameter. I like changing…

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Answer 8

The modern day equivalent of a 20.5 x 8-10 tire is going to be a 205/65-10. The dimensions are as close as you can get to the old size. We have several tires and tire and wheel combos in this size with various bolt patterns (if a wheel is needed).…

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Answer 9

A 4 on 4 inch bolt pattern is measured diagonally on center. The first number indicates the number of lug holes and the second number indicates the diameter of the circle that those holes sit on. Check out the wheel bolt pattern help article that I…

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Answer 10

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 11

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside…

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Recommendations for Larger Tires on Jayco Pop-Up Camper

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