Before rushing out and spending a bunch of $$ based on a neighbor's opinion, you need to know that ST trailer tires are a different animal compared to passenger car tires and need to be treated differently. Many blowouts are simply due to improper care and attention and not brand or country of origin. When you read about blowouts, you will never know the history of the tires and how they were treated. Under-inflation and over-loading ST tires are major causes of failures, followed by excessive speeding over 65 mph. All 3 of these cause internal overheating of the tire's structure and irreversible damage that can't be seen by visual inspection.
1. Weigh the TT, total and side-side, and compare that to the load capacity rating on the tire. You want at least a 10 percent load capacity reserve and 20 percent or more is better. Trailers can sometimes weigh more on one side.
2. Do not exceed 65 mph (most ST tires are rated 65 max.).
3. Use the correct psi (cold) and check regularly. Checking psi is a good idea before heading off on each leg of a road trip.
4. Stay off road shoulders at all times to avoid picking up something that can puncture a tire.
5. If parked in any one location for a longer period of time, tire covers can help to reduce tire damage.
6. Use a TPMS. Won't warn you of an impending catastrophic failure, but can tell you if the psi is heading downhill and give you a warning something isn't right.
If you have 14" or 15" load range "C" tires at present, they will probably have a good load capacity reserve. If you believe that the tires were not treated appropriately, then I would consider replacement. Otherwise, keep the tires. According to this post on the Jayco forum, Jayco does cover blowouts under warranty.
Jayco tire warranty. If that's the case, why not keep the tires at least until the 2 year Jayco warranty ends.
There is a ton of excellent info. on this RV tire blog by a retired tire engineer:
RVtiresafety.com
