Tire ramps or blocks may damage your tires


RV Tire Safety

with RV tire expert Roger Marble

Last year I was at a large RV event and noticed many Class B RVs were using various blocks or ramps in an effort to get the RV level. Here are a few examples:



None of the above is what I would consider acceptable. They all are too narrow or the tire is not properly centered.

The ENTIRE tread contact patch should be supported. On the left and below right you can see the contact patch and the size board I use.

Too narrow or with part of the tread hanging off one side can put extra stress on the belt edge and result in the initiation of microscopic cracks that could grow into a belt separation.

If you have some of the plastic supports you first need to confirm they are wider than your tire. You also need to pay attention and be centered side to side and fore/aft on the support.


Read more from Roger Marble on his blog at RVtiresafety.net.



Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

newest oldest most voted
Notify of
Sharon B

Northern Tool had one of their regular sales. They had hard rubber wide chocks with a handle for sale for $4.00 each. I bought 4 of them and what a deal!

Hank Thuener

I use Reversible 16 in. x 16 in. x 0.75 in. Terra Cotta Brick Face/Flat Profile Rubber Paver, available at Home depot, I use the flat side up.

Billy Bob Thorton

With all due respect, you’re over thinking this. There would need to be data from tire industry sources regarding prolonged lack of support, which indicates premature tire belt degradation. Please post such data for review.

Sharon B

Thanks for that info regarding those plastic supports being possibly too small.
I’ll have to check them out again to see if the entire tire is supported.
After reading RV Travel for many years I became a tire freak. This will be another thing I will check out when I return home from the Tampa RV Supershow.

Thomas Becher

I’ve always preached about 2×6 boards being too narrow. I found the very best thing is a 2×10 laminated beam. You can usually go to a home construction site and ask for the cut off’s from the framing
Best if you can get plywood laminated and give them a treatment of wood preservative


Those plastic pads are not worth the effort to blow them up.Get a treated 2×8,or two if you have dual wheels,and cut to length to put under your tires.Make sure you have ALL the footprint covered asstated in the article.

Omer Murray

I agree with the point of fully covering the footprint of the tire. I think otherwise would cause premature damage to the tire. I use flat plywood directly under the tire footprint, even if I put stackable blocks under the plywood.

I would like to ask a tire question that may have been covered in the past but I have not seen it.
I have a 13.5K dry weight 5w. Over the years, I have used several tires, usually Michelin trailer, and have gotten poor results.
The last time I needed to replace, I put on the same Nexen LT tire as on my f-250 except in the size fitting my trailer. The Nexen tire size required for the trailer has a weight rating greater than the equivalent ST tire.
I decided to try this since I had such a good experience when I went to Nexen from the much more expensive Michelins on my truck. The ride and handling made me think I had a new truck.
My experience with the trailer amazed me. The trailer tracks much better in all conditions, including wind. It pulls smoother and stops much better. What most amazed me is the measurable increase in mileage when towing.
With all my experience, I have been told often that I am risking serious problems by using an LT tire. I would like your thoughts and possibly the experience of others that may have tried using LT tires.

Elaine Ashton

THANK YOU SO MUCH for this article. Last year we purchased another 5th wheel. My husband used all sorts of boards to level the 5th wheel. I thought the whole thing looked unhealthy as the tire was on the edge of one of the boards. Shortly afterwards — my son borrowed the 5th wheel and had TWO blowouts — damaged the 5th wheel siding — cost a LOT of time and trouble for everybody. Now that “I” know how to properly level the 5th wheel — I will make every effort to do things correctly. It makes me sick that I didn’t follow my gut feeling in the beginning. The leveling arrangement looked dangerous even to my untrained eye. I should have listened. Thank you again for this GREAT article.