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in storage... parked for a time.
keep them out of the Sun...
keep them away from electric motors.
keep them from getting Wet..
keep them at 70 percent of max pressure..
do not use the Shine products...
do not let tires sit on dirt , gravel, concrete.... blacktop is not that bad...
pressure treated wood is OK.. as long as it stays DRY..
Tire manufacturers usually recommend 6 year replacement of tires regardless of miles. That doesn’t apply to me cause my tires are toast after 3 years. Keeping them out of the sun and inflated like Chuck said I believe would help.
Goodyear makes a tire that has lubricants in the sidewall to resist dry rot. These tire are usually made for RV's but maybe they have others.
RV tires tend to sit for months and even years. Sidewall movement is key to keeping the sidewalls flex'd and allow natural emollients to keep the sidewall lubricated.
I hear Ozone is a main contributor to dry rot. One good way to check for dry rot is look at the bottom and in between treads for cracks. This is often the first clue.
Yes, direct sunlight will accelerate the dry rot process. Call Goodyear and see if they have tires to resist dry rot.
Note: Even if aged tires (6 + years or more) look good from the outside, they may be coming apart on the inside. Tire carcasses tend to start separating inside and become weaker with age.
Another Note: Never put sidewall sprays or tire dressings on as this will greatly accelerate dry rot. Petroleum distillates is diesel fuel.
There is a four digit code on all tires. First two numbers are the week ,next two numbers are the year. 0919 translates ninth week of 2019.
It's the DOT code i.e. DOT 5018 means the tire was made in the 50th week of 2018. Any tire you buy if it's within 6 months old would be considered fresh as they usually manufacture tires well in advance of the season for which they are intended. i.e. summer vs. winter tires