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What does “MAX PSI” on tire sidewall mean?

Roger Marble -
The "MAX PSI" number on the tire sidewall IS NOT the maximum psi a tire can tolerate. Yes, this wording can be confusing. But...

Proper tire repair, and examples of outrageous DIY tire ‘repairs’

Roger Marble -
This is from the U.S. Tire Manufacturer's Association regarding proper tire repair after being damaged: Tire Repair Basics Tires must be removed from the rim/wheel...

RV tires: ‘Interply Shear’ and other techno babble explained

Roger Marble -
Yeah, I'm gonna get technical. Some people do not understand why RV trailer tires have such a high failure rate and assume it's because...

Tire ‘load range’ or ‘ply rating’—Why it’s important to know the difference

Roger Marble -
I found a discussion on tire load range in a forum where the question "How strong of a tire do I need?" was being...

Tire bulge: Is it a defect or was the tire damaged?

Roger Marble -
Tire sidewall bulges can be difficult to diagnose. Sometimes it is even possible to misinterpret a depression as a bulge. So let's start off...

How many “ply” are in your tires? Why you should know

Roger Marble -
Here is a picture and comment I found on an RV Forum. I suggested that the owner review his understanding of tire construction and...

Why did my travel trailer have 3 tire ‘blowouts’ in 18 months?

Roger Marble -
I came across another post on an RV forum regarding tire blowouts. I am sorry to report that many of the posters did not...

Regarding tires, what is an RLOF? And why should you care?

Roger Marble -
"RLOF" is the short-hand abbreviation tire engineers use for a tire with a Run-Low Flex failure. In the past, this was one of the most...

Why you should not spin your tires: A forensic analysis

Roger Marble -
I have mentioned a few times that toward the end of my career as a Tire Design Engineer, I became a specialist in failed...

A twofer on tire design and recalls

Roger Marble -
DOT tire safety regulations Occasionally I will get questions about some specific feature in a tire or why tire engineers didn't design tires to perform...

Do you trust your TPMS or hand gauge for your RV tires?

Roger Marble -
I use Accutire brand digital gauges. I have three and they are all accurate to +/- 0.5 psi when I test against an ISO...

Proper care of tires is NOT rocket science

Roger Marble -
Looking at some posts and questions on various RV forums, it seems that some folks think that proper care of tires is as complex...
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