I took this from Vredestein's website -
30-Day Trial Period (
Quatrac5, Ultrac Vorti R, Ultrac Vorti, and Wintrac xtreme S tread designs only)
If, for any reason, you are not satisfied with a new set of four Vredestein
Quatrac5, Ultrac Vorti R, Ultrac Vorti, or Wintrac xtreme S tires installed on the same vehicle, you may return them to the original place of purchase for a full refund within 30 days after purchase.
Mileage Tread-Wear Coverage (Quatrac 5 tread design only) - 45,000 miles
Road Hazard Replacement Program (
Quatrac5, Ultrac Vorti R, Ultrac Vorti, and Wintrac xtreme S tread designs only)
You will be given a new tire, free of charge, if any of a set of four
Quatrac5, Ultrac Vorti R, Ultrac Vorti, or Wintrac xtreme S tires installed on the same vehicle suffers non-repairable damage from puncture, snag, cut, bruise or impact break caused by road hazards (for example, nails, glass, potholes and other debris) before the earlier of the loss of 2/32”(1.59 mm) of tread depth or one (1) year from the date of purchase.
https://www.vredestein.com/warranty/