Looking for some new winter tires and possibly wheels, when I realized I have 4 Pirelli Sotozero 3 225 45 18 tires with minimal wear from my old Subie Legacy GT sitting in my storage area (not exposed to light but not climate controlled). They have at least 8/32 tread left ,maybe more , and appear to be in great condition but were purchased in 2015. No visible cracks or wear. Are these still fine to use, or is 7 -8 yrs too much? Any way to objectively check?
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