I need a throttle stop.
It's more of the case of how these were stored probably outside in an old shipping container or in a freezing cold warehouse. There are very specific ranges of temperature nothing below 10 degrees or there abouts for long periods of time as I recall.This is why it is so difficult to apply a blanket recommendation. Ask some people, they will say 4 years. Some say 5. Some say 7. The truth is, there are some tires out there that are 3 years old with dry rot
They were ordered late the previous season and I got them in mid April the following year. Not every ultra high performance tire is going to be like this but anyone who has driven F1 supercars in cold weather can attest they get really hard and really slippery in a hurry.
Of course none of this applies to you guys in the south but I bet a tire that sits in a shipping container for a summer season 100+ degrees every day will see some residual damage.
FWIW the tires were Advan AD07's