Discoverer AT3 4S

Cooper Discoverer AT3 4S: what the numbers tell you

The Discoverer AT3 4S's UTQG treadwear rating of 600 puts it in the long-wear class. Its compound is engineered for life over outright grip, which is appropriate for an everyday touring tire. The 60,000-mile warranty is one of the most concrete data points for a tire. It is the manufacturer's own statement of compound durability under normal use. Warranty replacement is typically prorated, so it will not fully offset the cost of a new tire, but the warranty length is a reasonable expectation of useful tread life.

Cabin noise of 73 dB is mid-pack for the segment, comparable to most performance OEM rubber. As a all-season tire built for the truck-suv segment, the Discoverer AT3 4S is positioned against direct rivals within the same category. Comparing it to a tire in a different category (e.g. summer vs all-season) makes the spec sheet misleading because the design targets are not the same.

All-terrain SUV tire — daughter of the AT3 with refined on-road behavior for crossovers.

For an apples-to-apples comparison against direct rivals, see the comparison pages linked from this tire's brand index.