Cooper Discoverer STT Pro Review

As a brand Cooper might best be know for its off-road and truck tires, and when it comes to those offerings, the Discoverer STT Pro is the brand’s most extreme offering.


  • Off-road grip
  • Durability
  • Surprising dry weather on-road performance
  • Made in the USA


  • Could be quieter
  • No guarantee on tread life


In short, this tire is exceptional off-road. This is due in part to a truly unique tread pattern. We throw that word “unique” around a lot, but here it really is unlike other tires.

Impressively, the Discoverer STT Pro is quite good on road as well, with plenty of dry weather grip and very impressive wet weather grip – an area more extreme off-road tires often come up short.

Just look at the tread and you can see it’s not five lines of tread lugs like an all-season or all-terrain tire, nor is it 4 lines like a mud terrain tire. It’s both. And neither.

Looking closely you can see that both the inside and outside patterns alternate, giving the tire unique grip capabilities and that surprising on-road performance too. The on-road performance comes as  result of the inner tread pattern that effectively alternates from one to two lugs, giving stability while reducing noise.

Small designs into the base of the tire help prevent rocks from collecting there – something that can lead to uneven and premature tire wear. Meanwhile small dimples in the sides of the tread lugs help remove loose soil and mud.

The alternating shoulder lugs help dig in and toss-away loose dirt and mud, while the design etched into the sidewall has what Cooper terms “cleats” and “scoops” to either help dig in to hard surfaces, or toss away loose surfaces.

The “Rock Climber Sidewall” also works to give added grip (and protection) when rock-crawling.

And finally, of its many many features, the STT Pro is made with Cooper’s Armor Tek3 construction process with a 3-ply carcass that offers 50% more protection than standard tires, giving it durability against cuts, slashes and punctures.

If it is lacking, there are obviously some noise drawbacks to a tire with a tread pattern this aggressive, as well as on-road handling that is ponderous. Neither of these are surprises. A final area it is lacking in, where we would like to see some improvement is in overall tire life. Don’t expect more than 40,000 miles on a set. (Although, honestly, don’t expect more than 40,000 miles on any mud terrain tire).

Cooper Discoverer STT Pro Price

Different retailers can always offer different prices, but the Cooper Discoverer STT Pro generally starts at around $150 and tops out around $450. We also recommend you shop around of the latest online tire deals, as there are often special discounts and rebates being offered, especially on holidays or shopping holidays like Black Friday.


Cooper Discoverer STT Pro Warranty

The Cooper Discoverer STT Pro is not covered by a specific mileage warranty but is backed by the brand’s standard limited warranty. This applies to original owners of the tires with proof of purchase and covers defects in materials and manufacturing for the first 2/32 of an inch of treadwear, which Cooper will offer a replacement tire free of charge. Tires worn beyond that threshold and that are found to be defective will get a pro rated coverage (found by multiplying the dealer’s sale price by the percentage of tread worn from the tire).

For more on the Cooper STT Pro tread life, see our article here.

It also comes with the brand’s 45 day road test warranty.

Cooper Discoverer STT Pro Sizes

15-inch tires


16-inch tires


17-inch tires


18-inch tires


20-inch tires


22-inch tires


What Vehicles Will The Cooper STT Pro Fit?

(Not a complete list of ALL vehicles this tire will fit)

  • Chevrolet Silverado, Avalanche, Suburban, Tahoe, TrailBlazer
  • Ford F-150, Escape, Explorer, Expedition, Ranger
  • GMC Canyon, Sierra, Yukon
  • Honda Pilot, Ridgeline, Passport
  • Jeep Grand Cherokee, Wrangler
  • Land Rover Range Rover
  • Nissan Titan, Frontier, Armada, Pathfinder
  • Ram 1500
  • Toyota FJ Cruiser, Highlander, 4Runner, Sequoia, Tundra, Tacoma, Land Cruiser

Is the Cooper Discoverer STT Pro Good in Snow?

While this mud-terrain tire can scoop out fresh snow nicely, it’s winter capabilities are limited. It features very little siping, something winter tires use to hold snow to the tire and use it as a friction point against the snow on the road As a result, on packed snow and on clear but cold roads (or ice) if offers very little grip. Unlike Cooper’s Discoverer AT3 4S it does not feature the three-peak mountain snowflake logo and is not certified for extreme winter use.

How Many Ply is the Cooper Discoverer STT Pro?

The Discoverer STT Pro features a 3-ply sidewall. This not only protects against side-punctures on the trail or worksite, it also allows the tire to be aired down and up repeatedly without damaging the sidewall.

In terms of the tire’s load rating, many versions are load range E or 10-ply, while a few versions are load range C.

Is the Cooper STT Pro Loud?

Like pretty much any dedicated off-road tire, the STT Pro is loud. It’s not brutal, like some more budget-focused options, but it’s designed for maximum off-road grip and that does have some real world drawbacks.