Is using state scales for “four corner weights” wise?

RV Tire Safety with RV tire expert Roger Marble I was following a forum thread on using closed state scales to learn your “four corner weights.” This is possible in Washington, Oregon, and some other states.  Some commenters felt the practice was not wise as the area around the platform scale might not be perfectly flat. I posted my thoughts... Read More

Are you smarter than your RV tire salesperson? You may need to be

RV Tire Safety with RV tire expert Roger Marble With the Michelin LTX tire, you may need to be smarter than your RV tire salesperson. As an RV owner, I believe that in most cases it is important for us to know as much as possible about our tires. Sometimes this means knowing more about our tires than the average... Read More

Is it worth it to inflate tires with nitrogen?

RV Tire Safety with RV tire expert Roger Marble Regarding nitrogen (N2) passing through (permeating) tire rubber more slowly than oxygen (O2) due to molecular size, are nitrogen molecules really larger than oxygen molecules? According to the Get Nitrogen Institute in their paper on N2 effusion, “The correct answer, with respect to ‘permeation,’ is yes.” So I imagine your question is: Why... Read More

Did your RV company/dealer follow federal law regarding tires?

RV Tire Safety with RV tire expert Roger Marble I’ve been reading a number of posts recently on recalls, violations of federal safety standards in the RV industry and on tire and fire extinguisher recalls. If you have been a reader of my blog, you know that I am a strong proponent of filing complaints on failures of safety-related systems and... Read More

What you should know about tire “safety margins”

RV Tire Safety with RV tire expert Roger Marble Some people ask “How much Safety Margin should I have with my tires?” While this concept is simple, the reality is quite complex. If you want to skip over “why” safety is complex just jump to the “Bottom Line” below. In engineering it is more proper to talk about “Safety Factor”... Read More