What is the collective wisdom when to replace a spare tire? Covered with Sun cover and obviously no weight on it. I suppose just being exposed to the air causes tire to break down. When does spar...
If the tire set lasts I keep the spare for a couple times while I replace the others. Top line Goodyear LT tires on the truck have performed well so I just replaced the spare at 17 years.
If the set is junk like the DUROs, Denmans, and Maxxis I have had then I replace all at the same time including the spare.