I bought 2 used wheels + tires for my Legend. The tires have perfect sidewalls, tread that looks like it hasn't been used, but there are small cracks all over the tread. I can't even come close to seeing the belts anywhere, but I'm wondering if tires are typically safe with these cracks that I assume are due to age and constant sun exposure, or if I should put new tires on ASAP? If I wait, it will only be for about 2 months/2-3000 miles.
Here's a pic of one of the tires:
Wheels/tires obviously weren't abused
Here's a pic of one of the tires:

Wheels/tires obviously weren't abused
