Exactly how OLD are those tires? They should have a production date stamp on them. I got burned after buying a set of replica rims and tires with 90%+ threads only to find out the tires were manufactured in 2000.

The rubber on the tires had detriorated (like plastic) and could not be balanced. Had to sell the set at a loss for the price of the rims alone.

The tire guy suggested to avoid winter tires more than 5 years old from date of manufacture.