Originally Posted by Davidg
Why do you think a RV manufacturer would design axle spacing just to make it difficult for the eventual owner. This must be a decision made by some risk management group. Overall, I guess I fail to see the downside for them to make it easier for me to put higher quality tires on a trailer. I'm curious what your thoughts are.
Center of gravity on a RV trailer with tandem axles seems to be the point of interest with the designers. They know the tires are going to skid a lot in turns, especially tight turns. Iíve turned real tight on pavement before that left pieces of rubber in the skid marks. Never noticed that much with my tandem axle boat trailers. But, none of them had the load of my RV trailer.
A lot of people that write about tires get confused about the regulations the trailer manufacturers must follow when building our trailers. The regulations for commercial tires differ considerably and are often used when describing servicing of RV trailer tires.
RV trailer tires, no matter what design (ST - LT - P), are fitted in accordance with FMVSS regulations and what the trailer manufacturer deems appropriate. Once you own it itís up to you, unless, the trailer manufacturer has provided optional fitments. If not, its use what they used or find something of equal or better load capacity and quality. One thing you should always keep in mind is; tire retailers do not always have your best interests in mind when selling you some tires. They may know tire industry standards and just not practice them all the time.
Just a note: The trailer manufacturer's do not lock in tires by brand, just size. Therefore you're encouraged to look at all of the brands in your desired size. Maybe going up a single load range will suffice. I look for tires with proven warranty coverage.