CapriRacer wrote:
If you look in the Tire and Rim Association (TRA) Yearbook, you'll find the speed restriction listed - so I don't think you can say it is the manufacturers that self imposes the restriction - at least, not in the normal sense.
Unfortunately the TRA does not publish that information - unless you purchase their publication - so the general public only sees what the tire manufacture does say.
Now that you have said that the TRA does have speed charts for all tires maybe you can answer this query.
The only Michelin branded tire currently being fitted to any RV trailer axles is a European designed 17.5” LRJ truck tire. It’s being fitted to 8000# axles. That particular tire has a 62 MPH speed restriction as posted in Michelin’s tire data book. I have emailed them numerous times - changing my wording on each occasion - to inquire about the speed restriction. They have never answered me. From the information I have been able to gather the TRA says that tires of that design with speed ratings below 65 MPH CANNOT have their load capacity and air pressure manipulated to gain any higher speeds beyond 62 MPH. Can you substantiate that?
FE
