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

Will the “correct” tire pressure issue ever be resolved?

RV Tire Safety with RV tire expert Roger Marble Question: Do you think the tire pressure issue will ever be resolved to people accepting the values recommended by the tire manufacturers based on actual loading? Or will some always be confused between the tables, the placard and quotes of Federal Motor Vehicle Safety Standards (FMVSS) from some on the forum?... Read More

OK to change tire size on duallies?

RV Tire Safety with RV tire expert Roger Marble Question from RVer on a forum “I need six new tires for a 2004 38-foot Dutch Star on a Spartan chassis. Michelin tire models and sizing has me totally confused. Current Michelin size is 275/80R22.5. Dealers claim this Michelin size is interchangeable to 295/75R22.5 from brands that don’t offer the original... Read More