Here is a picture and comment I found on an RV Forum. I suggested that the owner review his understanding of tire construction and that he read the material list that is molded on the sidewall of all tires. The failed tire does not have 12 or 14 “ply”. I also pointed out that it does not appear to have a “ply” of nylon over the steel belts.
Do you know how many “ply” or layers of which materials are in your tires?
The owner said: “After many problems with ST 12 ply I have moved to “xxx” brand 14 ply and no more problems. I drive to Mexico and back every year 9,000 mi.”
I pointed out the problem with thinking that there were actually 12 or 14 “ply” in the tires, as that term lost its meaning when tires were switched from “bias” or “diagonal” to “radial”. My recommendation is that ST-type tires include nylon or a similar material as “cap ply” over the steel belts. This can help lower the Interply Shear stress forces found in tandem axle trailer applications.
If you do not know what Interply Shear is, then I suggest you review this post.
The tire failure probably had a contributory cause of impact damage from the poor roads in Mexico.
Here is my post on the scientific study of impacts and tire failure showing a 100% correlation.
Roger Marble
Check out my Blog www.RVTireSafety.Net
Read more from Roger Marble on RVtravel.com.
##RVT1131
Never buy any Chinese will blow tires.
Any tire made in any country can fail if it is sufficiently overloaded or under-inflated. The term “China-Bomb” is as misleading as saying “Crap Indiana RV” simply because most RVs are built in Indiana and most RVs have some design problems
I have read here many times that the GY Endurance is a good choice. However when I search for a 16” “G” rated it isn’t offered?? Is this true??
Load range “G” be found in larger Class-A size tires with wheel dimensions of 19.5 and 22.5″, depending on the size of ST tire you are looking for you will find LR-C, LR-D, and LR-E. I don’t think Goodyear makes an ST “Endurance” in LR-F or heavier. But you never know what their marketing plans are.
There are a number of tire companies that make “TBR” (Truck-Bus-Radial) tires in LR-F and heavier. I think I recall seeing a 16″ truck tire (not ST) in LR-F but with hundreds of tire size and LR combinations, I can’t keep track of every tire made.
I run the Goodyear G614 LT235 /85 R16 126 G BSW on my triple axle Toyhauler. I am very happy with them.
Thank you, Roger. I am confused. I just did a web search to see how many ply our Michelin 305 70R 22.5 tires have. A tire outlet website reported 20 ply for these tires. Whether it is or isn’t 20, the search was eye-opening as I found our RV tires currently retailed at more than $1100/tire before taxes, etc.,. Yikes! Thankfully, we no longer have an RV with a tag axle, so we only have 6 tires rather than 8. 😉