Ok, here is one for the engineers. Just how much credence do you put on a tires speed restrictions? The individual tire manufacturers are the ones that self impose speed limits for their RV trailer tires or others used on other recreation vehicles.
I hate to bring brand names into a discussion but it’s necessary here to show where such information might be found.
Click here, on the Carlisle tire page click on the resources tab and then open the PDF; Trailer tire maintenance. In the PDF file you will find that Carlisle is very careful about how they word the speed limit of 60 MPH for towing trailers. When filing claims against Carlisle trailer tires I would also be very careful not to admit constantly operating my trailer over 60 MPH.
Carlisle is a major provider of trailer tires to many users in the RV trailer industry and just as many if not more users outside of the RV trailer industry. They can provide ST tires from 12” to 16” and their LRF 16” tire is rated for 3960# @ 95 psi making it very suitable for the 7000# axles.
Here I’m going to talk about a specific tire. It’s talked about a lot on the internet tire threads but is yet to be tested as an Original Equipment tire. I bring this particular tire up because it has a double standard speed rating. It’s the Michelin XPS Rib. If a buyer goes down to their local Michelin retailer and purchases some XPS Ribs as replacements for some ST tires they will most likely get XPS Rib tires with a “Q” (99 MPH) speed symbol molded into the tire. When that same tire is used as OE on a RV the symbol is omitted and the specs in the RV usage section of the Michelin document will list the speed rating for that use as 75 MPH. Because the tire is not used as OE in the RV trailer industry it’s a toss-up as to it’s speed restriction on those axles. Can you shed some light on that?
XPS highway tire specsXPS RV tire specsFastEagle
