ST Tire "Plies" Question and a PSI Question
(BTW I am aware of the various "issues" concerning Carlisles, Marathons, and ST vs LT, having read many tire threads here over the years. Moving right along then-- :) My 2002 built OEM Goodyear Ma...
Forum Discussion
Tireman9 wrote:
" If ST's are designed for the unique sheer loading of trailer use, then they should be capable of surviving for more than 3-5 yrs"
The key word is "IF". Quite frankly it takes some serious effort and high power computers ($$$) to do a complete F.E. analysis. It also requires a desire to know the answer and even to conceive of the potential problem. If your primary goal is to build the lowest cost tires why would you spend tens of thousands on theoretical research.
A Google search finds only limited reference to this concept so I am not surprised if the low cost tire companies don't spend their money on this research. After all their tire warranties, if any, have a very short timeframe.
Carlisle states 3-5 yrs for their ST tires, use max PSI and don't tow over 60 mph. So are they building lowest cost ST tires? With so many ST tire failures across all brands and the industry claims about what is so different about ST tires, why do you classify F.E. analysis as "theoretical research"? Why can't ST tires be designed to both handle sheer stress and travel at speeds above 60-65 mph?
