Keep a check on tires not in use!
Tires age even when they're not being used. Surface cracks appear in the rubber and the carcass can distort. Proper storage increases the life expectancy and performance of tires.
Tires should always be stored:
• in a well-ventilated, cool, dry area, away from direct sunlight and adverse weather conditions,
• away from any chemicals, solvents or fuels that may affect the rubber,
• away from any object capable of penetrating the rubber (pointed metal or wood),
• away from any sources of heat or flames and any substance that could cause sparks or an electrical discharge,
• away from any source of ozone (home ozone generators, electrical appliances and air pollution). Powerful oxidant causes premature corrosion of the elastomers, which then crack.
Storage guidelines vary, depending on whether your tires are mounted on rims or not.
You can then swap your front tires to the rear the following year to balance their wear. Clean your wheels and tires with water and dry well to limit any corrosion. Remove any stones or debris that have been trapped in the tires grooves.
In this case, the weight of the vehicle (caravan, trailer, etc.) needs to be taken off the tires, by jacking it up or removing the tires. Failure to do this may cause irreversible damage. Don't forget to check the pressure before using the tires again.