Traces of ageing are not signs of wear-and-tear, but rather damages caused by
improper storage. The correct way to store tyres is in a cool, dark and dry
environment - and it's important to not stack too many tyres on top of each other.
However, if tyres are stored in a place where they are exposed to a lot of
sunshine, for example, the UV rays allow the softening agent in the tyres to
escape. Over time, this results in the emergence of fine cracks. So, if you notice
any cracks, ruptures or porous areas in your tyres, do no re-mount them for the new
season. If you are unsure about anything concerning these points, consult a tyre
expert in your professional workshop.