Dear epjx31,

1) Are OEM tires really different from aftermarket?
- I recently bought a car that came pre-fitted with Bridgestone Potenza S001, which has very polarized wet performance review result on the internet. (Mainly poor results)
- I am skeptical to keep it after these reviews, but I also remember seeing Michelin saying how they custom developed PS4S for BMW M star marked tire.
- Could there be a chance that the S001 i'm having is also designed in a different way to suit the car I'm having?

2) When tires are stored for 6 months at a time without temperature-controlled storage, will there be any degradation from the atmosphere? (Assuming it is stored shaded, but not temperature-controlled)
- I live in a 4 seasons country with mild winter, average temperature is around -5 centigrade range, with a week or two of cold waves that will go as low as -18.
- I took delivery of the car during winter and I immediately swapped out the summer Bridgestone to a Michelin PS4 All Season.
- I stored the summer tire at the tire shop and may / may not swap them back when temperature rises in spring (depending on how much confident I have in the Bridgestone S001 vs my current PS4 AS)
- I took a look at shop's storage area, it is a shaded warehouse but looks to be not temperature controlled. In this condition, will the summer tire degrade after 6 months of storage?