*8 years out of a tire used on an RV is great. I think all the ducks were in a row for you. Weather, covers from uv, rubber compound used, driving habits etc :C
Normally, people drive their cars often enough to 'spin the tires' to exercise the rubber but on RV's that usually isn't the case.
We try to overcome sitting idle for long periods of time by using our rv for lunch or dinner rides 2x a week. Especially during covid , we look forward to a different piece of scenery other than my 4 living room walls. It makes us appreciate it even more to be looking out our rv window to view nature to just relax and enjoy one another for the time we have.
I think using a product like 303 Protectant helps to protect tires after we wash our rvs and tires with soaps and maybe other tire chemicals that can possibly diminish the natural protective additives in the tire compound .
From a tire article that I had been reading, I condensed it by copying portions . The rest of this post is from a related article , if anyone is interested in reading about RV 'tire life'. :)
* The primary component in any tire is rubber, which could be natural rubber, styrene-butadiene rubber, polybutadiene rubber, or butyl rubber.
OXIDATION
Tires age the same way as humans. As they age, they lose flexibility. Blame oxygen. Elevated temperatures exacerbate the reaction. Anti-aging chemicals, activated by operating temperature, prevent premature cracking, but most all tires depart for the Happy Hunting Grounds by age 10 no matter the tire protection. Some tires, particularly summer tires exposed to winter conditions or vice versa, mature by six.
OZONE CRACKING
Tires may weather faster in urban areas. They degrade with exposure to ultraviolet radiation and ozone, a lightweight gas found in the atmosphere and caused by the partial breakdown of air from atmospheric electric discharges.
HARSH CHEMICALS
Harsh solvents and detergents used to detail tires can indirectly cause cracking. Tires are manufactured with anti-oxidation and anti-ozone protective tire protection layers, which are designed to shield from the solvents, salt, oil and fluids on American roads. Harsh cleaning chemicals can strip a tire of its clothing, as it were, and leave it exposed to ozone and sunlight without UV protection.
BAD DRIVING
Fast ‘n’ furious driving can cause tires to age too soon. So can scraping against a concrete curb. Also, under-inflated or overinflated tires place undue stress on tire sidewalls and cause fissures and flaws.
