Light Truck Tires

Discoverer STT PRO

Discoverer STT PRO™ is rated 4.5 out of 5 by 52.
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Discoverer STT PRO

Standard Limited Warranty
M+S Rated

The Discoverer STT PRO is Cooper’s most advanced, extreme tire to date! The Discoverer STT PRO provides exceptional traction and performance in some of the harshest terrains on Earth. The distinctive tread design and compound provide remarkable on the road performance without sacrificing off-road traction. 3-Ply Armor-Tek3, silica tread compound, aggressive 3-2 center rib design, side-biters and more, all wrapped up in Cooper’s advanced mud terrain tire. Push the Discoverer STT PRO to the limits and you’ll “discover” what your vehicle is truly capable of!

Tire Sizes & Specifications Will This Fit My Vehicle?

Features & Benefits

  • “ARMOR-TEK3®” Carcass Protection provides 50% more protection against impact damage than standard 2-ply tires.
  • The inner tread ribs alternating 3-2 pattern provides a number of significant performance benefits like: reduced road noise, increased stability and handling, superior soft surface (trail) and mud traction.
  • The “flex groove” provides a smoother ride by helping to dampen the impact generated by inconsistencies in pavement, potholes and gravel.
  • The Discoverer STT PRO features large, specially-designed cleats of rubber (side biters) on the shoulder area of the sidewall, to enhance traction and grip.
  • The asymmetrical scallops on alternating lugs direct mud into the mud scoops to allow the tire to pull through muddy terrains with ease.

Customer Reviews

Rated 5 out of 5 by from I love the aggressive look with great street durability I bought these tires back in July 2015 when I didn't see anyone with them. They have exceeded all my expectations! I thought maybe they were just a great looking tire but they PERFORM! they have passed any test I have put them through. A lot of tires I have had in the past spin in the powder sand we have in Florida but these tires float. They have got me out of clay mud in Alabama. And the best part is the tread still looks amazing after 2 years of mostly road wear. I do maintain them with rotation, balance, and alignment regularly though.
Date published: 2017-07-31
Rated 5 out of 5 by from Outstanding after 20,000 miles I have a set of 305/55R20 on my 2012 Silverado 1500 and i am in love with them. These are my first mud tires so before I bought them I did a lot of research on the different brands. Ultimately I bought these because they're American, a newer design, and the reviews were great. I have put 20K on them with everything from highway, around town, sand, mud, you name it. They are quiet on the road but still have a nice hum to let you know you're rolling on some bamf tires. I have no issues with how they handle on dry pavement. I keep them at 35psi cold. The tread ware is pretty solid with much more than half left after 20K. At really low speeds you can feel the tread blocks but that's to be expected. Once you get rolling they are smooth. They get a LOT of compliments on the looks. I can't say enough about the offroad performance, that's where they really impressed me. Just recently I did some trail riding where it was mostly jeeps. I ended up pulling a jeep out of a mud hole I had just driven through. People were shocked a pickup could tackle the terrain meant for jeeps. I credit it to the tires. Come to think of it, I have never gotten stuck with these but I have pulled multiple other people out. Great on road manners, beasts in the mud. You won't be disappointed.
Date published: 2017-07-28
Rated 5 out of 5 by from These tires are the best off road tire I have ever purchased. I bought these tires in the spring of 2016 for 2500 duramax. These tires have 43000 miles on them and still have 40% tread left. I drive 114 miles a day to and from work on back country roads to interstae hywys running 70 to 80 MPH. They make a little noise they are a mud tire but the noise is exceptable. I live in middle TN and we have all 4 seasons so i get to drive in rain snow and mud when I go hunting. never been struck and never had an issue with these STT Pros I will be purchasing these tires again if and when they wear out may-be another 25 k miles
Date published: 2017-07-26
Rated 5 out of 5 by from Never had a better tire I have a 2014 ram 1500 bighorn and I gotta admit they have a mean nasty aggressive look but don't let that look fool you cause the tire is extremely nice it has a soft ride quite going down the road only time they made noise and got ruff is at low speed on hard top other than that I'll be buying another set they made my pickup look sexy and people compliment the tires ALL THE TIME
Date published: 2017-07-16
Rated 5 out of 5 by from One of the best just got a set of 38 20 for my truck very good super smooth and quiet. I'm not taking them off road yet but have climbed a few curves. First time I've gone to Cooper for any kind of tires and I think I'll be back
Date published: 2017-07-09
Rated 5 out of 5 by from It's an off road tire I did extensive research on these tires and what ultimately sold me was everyone who swears by these tires and has been running some form of Cooper Tires for decades. At first I wasn't sure if I liked how they handled compared to my previous tires (GY all terrains). I can feel the aggressive tread and hear the tires at all speeds. It's when I drove off the pavement that solidified my confidence in the tires and my purchase. These tires have incredible dry surface traction. It's driving through the mud that provided the greatest proof of purchase for me. My Tacoma feels like a tank with these things on in the mud, no problems pulling me through! I am completely satisfied with the purchase and as long as you remember they're not a street tire, and can live with some minor on road rudeness, these tires are a 100% confidence booster!
Date published: 2017-06-23
Rated 5 out of 5 by from Great tire I had a set of the previous version of this tire and, after 64,000 miles, they needed to be replaced. I bought 4 new STT Pros and they are now mounted on my 11,000 pound custom 4WD van. These tires are better than the previous model. First, they are quieter on the highway. That surprised me. I know new tires run quieter than worn tires but, for the first time ever, my wife and I talk without shouting at each other. Second, running at the same 65 psi as the previous tires, these are noticeably "softer" and less harsh. The ride is remarkably smoother. Finally, their off-road performance, which is why I have these tires, is great. The sidewalls are more protected, the tread design is more aggressive and cleans better and they grip well. This is a great tire.
Date published: 2017-06-19
Rated 5 out of 5 by from this is a good tire for a dedicated off-road or mall crawler I've run a different tire on my 4x4s for years. I built a new, mostly off-road Jeep in 2016 and put the Disco STT Pro 315/70R17s on a set of 17x8.5 wheels on it. They really perform at low-crawl speeds in swampy land, loose sand and jamming in the mud. I hate to say it, but they are quiet on the paved roads too.
Date published: 2017-06-11
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