If your car spends more time under a cover than on the road, its tyres are quietly working against you. Rubber that sits static under the full weight of a vehicle for weeks or months doesn't age the way rubber that's driven regularly does — and understanding why is the first step to protecting a car you've invested serious money in.
Why tyres degrade in storage, not just on the road
Tyres are designed to flex. Every rotation redistributes weight across the contact patch and lets the compound recover its shape. Remove that rotation and you remove the recovery. The section of rubber under load stays compressed in one place, and over time the polymer chains inside the compound take a "set" — a permanent or semi-permanent flat area exactly where the tyre met the ground.
This is compounded by three factors that have nothing to do with mileage: ambient temperature swings, which accelerate compound stiffening; humidity and UV exposure, which dry out the oils that keep rubber supple; and — the factor most owners underestimate — contact pressure. A tyre resting on a flat concrete or epoxy floor concentrates 100% of the vehicle's weight onto a small, static contact patch. That's the single biggest cause of storage-related flat-spotting.
The core rules for storing tyres long-term
Inflate before storage, not after. Tyres lose roughly 1–2 PSI per month even when parked, and an under-inflated tyre flat-spots faster because there's less air pressure resisting the compound's deformation. Bring tyres to the upper end of the manufacturer's recommended range before the car goes into storage.
Get weight off the contact patch. This is the single highest-leverage change you can make. Anything that increases the surface area in contact with the tyre — or removes contact with a hard flat surface entirely — reduces the concentrated pressure that causes permanent set. This is the entire principle behind tyre cushions: rather than resting on a flat floor, the car rests on a contoured cradle shaped to match the tyre's curve, spreading load across roughly 400% more surface area than a flat floor would. ALTairEGO's tyre cushions are engineered specifically around this principle, in a proprietary EVA compound designed to hold that shape under load indefinitely.
Control the environment. Indoor storage with stable temperature and no direct UV exposure will always outperform an outdoor cover, even a good one. If outdoor storage is unavoidable, a breathable, weatherproof cover matters as much as anything under the tyre.
Move the car periodically if you can. Even rolling a car forward or back a few inches every few weeks shifts the contact patch and prevents a single point from taking 100% of the load for months on end. If that's not practical — which is common for collectors storing multiple vehicles — cushions do the job of continuous surface distribution without any maintenance required.
Matching protection to the vehicle
Not every car needs the same level of protection. A track-focused GT car being stored for a season has different demands than a vintage vehicle in a private collection stored indefinitely. ALTairEGO's tyre cushion range is built around this — Super for cars up to 2,000kg, Magna for heavier performance vehicles up to 2,750kg, and Leader for classics, SUVs, and vehicles up to 4,000kg. Each set is sold in fours, Italian engineered, and rated for both indoor and outdoor use.
The bottom line
Long-term tyre storage isn't complicated, but it is easy to get wrong by doing nothing. Correct inflation, a controlled environment, and — most importantly — taking weight off the flat contact patch will keep a stored car's tyres in the same condition the day it comes out as the day it went in.