Time to replace the 4 tires on out fiver as they ar 6 years old... We have the Goodyear Marathon G614 tires LT235/85R16 "G" and have had no problems with them... The place I go for tires is main...
I'm not riding on a manufacturer. I'm riding on tires. The manufacturers can pass all the test you want. The China tires "seem" to fail more often than the more expensive, heavier, U.S. made tires.