Your tires do not need anything. It is not recommended by any automotive journal or manufacturer than I’ve ever seen, anyhow. If you think about it, the idea floating around the internet that a spray will reduce the wear on tread is absurd. To prevent sidewalk damage from years in the sun...maybe? Bags are intended to prevent UV damage, and keep your car clean when transporting them. If they’re stored out of direct sun, you don’t even really need them.
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