Wednesday, September 27, 2023


RV Tire Safety: DOT tire safety regulations

By Roger Marble
Occasionally I will get questions about some specific feature in a tire or am asked why tire engineers didn’t design tires to perform in a different manner. Sometimes some even want to question why I didn’t design a tire to perform some task such as supporting more load so the RV owner wasn’t forced to buy a more expensive tire.

The primary reason is that there are numerous federal safety regulations that all tires sold in the U.S. for highway use must pass or face fines that could be as high as $1,000 per tire.

For those that think they can do a better job of designing tires, I can save them some time when they do the research themselves – so they can ignore people such as myself who do have experience on the subject.

For those interested in the various safety regulations as they pertain to vehicles you can start HERE. Then start digging down to the appropriate specific standard.

For my 40-year career, I had to live every day under Chapter V National Highway Traffic Safety Administration, Department of Transportation, and most of the time focus on Section 571 (but occasionally confirm others sections such as 569, 573, 574 and a few others).

I found myself most concerned with Sub Part B and 571.109, 571.119 and, of course, 571.139. Our focus would change depending on the type and size tire we might be tasked with developing or evaluating.

I doubt that you want to have to learn all the appropriate sections. But if you don’t want to accept my experience and expertise, you are welcome to read and research all of 571 and then contact the appropriate department in DOT to get a clarification on some of the apparent contradictions.

Good luck with your research and education.

Have a tire question? Ask Roger on his new RV Tires Forum here. It’s hosted by and moderated by Roger. He’ll be happy to help you.

Read more from Roger Marble on his blog at or on


Roger Marble
Roger Marble
Retired Tire Design and Forensic Engineer w/50+ years of experience. Currently has Class-C RV. Previous Truck Camper, Winny Brave, Class-C & 23'TT. Also towed race car w/ 23' open trailer and in 26' Closed trailer. While racing he set lap records at 6 different tracks racing from Lime Rock CT to Riverside CA and Daytona to Mosport Canada. Gives RV and Genealogy Seminars for FMCA across the USA. Taught vehicle handling to local Police Depts


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Gary Stone
1 year ago

Roger…you are appreciated! I always value your expertise on the subject of tires and your no-nonsense approach to delivering solid information!

1 year ago

Let me get this straight they want more out of a tire but don’t want to pay more? I’ve always thought about 80 percent of people are dumb as a sack of rocks but with that question I raised it up to 81 percent.

1 year ago

I am always amazed that one of the most important safety components of a vehicle is one of the least expensive parts and that they last so long. Furthermore, the product keeps getting better, with flat tires being a rare event compared to my youthful driving experience 50 years ago. I have quite a number of children, now all adults, and I do not think any of them have ever had to change a tire on the road. Their worst experiences in general have been slow leaks from an embedded sharp object, usually discovered the next morning. Thank you to Roger and his colleagues.

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