Light Truck Tires

Discoverer STT PRO

Discoverer STT PRO™ is rated 4.4 out of 5 by 38.
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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 Solid all around MT I have these on a 2015 ram 1500 crew standard box ecodiesel 275/65/20 on factory rims from factory 60 series profile. I'm in Minnesota up by the Canadian Border. These tires produce a fair amount of noise on road coming from a factory highway Tire but by far not excessively loud. I'm going on about 9k mostly winter miles and I am a happy driver, can't even tell the tires have been driven on. Tons of tread. The rubber is stiff and there is not an abundance of siping so I have lost some winter traction. But not enough to complain. They ride nice, they howl a little, they handle pavement great, and as long as you have ground clearance you won't find yourself stuck. If you stop moving but aren't high centered then throttle through and these tires will dig and get moving again. Everything that I hoped for out of the Tire aside from maybe 4-5 decibels and MPG was hit a little harder than I hoped for. But i'm fighting winter MPG now also so it isn't just rolling resistance. Dropped from ~22 overall average to around 17-18MPG
Date published: 2017-03-02
Rated 3 out of 5 by from STT PRO Great off road traction !! But you can't hear yourself think. I bought these tires in the fall of 2016 for my 2016 Ram 3500 srw 4x4 with the Cummins and the Aisin which weighs in right at 8200 lbs unloaded. The size I have is 295/65/r20. They are on stock 20" wheels and I have Thuren leveled springs on the front end. I have approximately 6000 miles on the tires curently and I wanted to let others know how these tires ar doing for me. To start off I was embarrassed from the performance of the stock Firestone AT tires that came on this truck. I farm in central Illinois and drive in everything from deep sand to slick clay , from soft black swampy soil in the summer. On highways and gravel roads in the summer and in the winter. I also pull a bumper trailer with a 12,000 pound Takeuchi skid steer at least once a week through all of those conditions. Ok like I said I bought these tires because after getting stuck three times in mud less than 1" deep with the stock tires , it was time for something new. These tires will go places in 2 wheel drive that I wouldn't have even considered with the Firestones when in 4 wheel drive. The tires do great in mud , sand ,snow , and even pretty decent on ice. But after only 6,000 miles the tire howl so bad going down the highway that it sounds like i am driving down the rumble strip at 80mph weather I am going 30 mph or 70 mph on smooth highway. The tires seem to be wearing pretty evenly I just rotated them and had them rebalanced. I would say that they have about 90-95 % tread left. These stt pro tires are a great off-road but are obnoxiously loud on the highway. There has to be a quieter tire with great off road capabilities out there. These stt pros are driving me and my passengers nuts.
Date published: 2017-03-02
Rated 5 out of 5 by from great set of tires i have 33x12 stt pros on my 2005 f150 and the only flaws that i have noticed is that they are kind of loud when you are on paved roads, but they are a mud terrain tire. buy a set of all terrain tire if you dont want a set of tires that hum when you go down the road. they will crawl thru any mud hole, or dig thru any snow drift you throw them at.
Date published: 2017-02-22
Rated 5 out of 5 by from Really good all around tire! Let me start off by saying I searched for probably 2 months before finding these tires and falling in love with the looks. What really made me pull the trigger were the aggressiveness and the advertisement of a quieter, longer lasting mud tire. I bought these tires when my truck had 9K miles on it. It now has 45K on it. Ohh btw my STT PRO's are 275/65/20's. These tires appear to still have 40% tread left on them. (I rotate them every oil change which is 5-6K) It's hard to believe they have 36K on them and I think I can get another 10-15K easy and I'm not the kind of guy to ride around on tires until they are totally bald and unsafe! I've heard many horror stories of people only getting 20-25K miles on mud tires. Haven't really driven them in snow as I am from the deep south. Also forgot to mention probably 20% of my mileage is towing a 16' enclosed trailer with 2 large atv's or towing a small utility trailer with 1 large atv on it. Here's the scoop. Good: Awesome looks and great off-road capability. Very good on dry or wet pavement (surprisingly). They are durable. I have jumped many curbs, rode through rocky terrain, embankments etc and not a scratch on the sidewalls. Not bad price compared to other brands "similar tires". Bad: They are a little rough riding but being a 10 ply with extreme tread pattern that should be expected. They are a little noisier than I had hoped for but coming from a brand new F-150 Platinum 4x4 with Bridgestone Alenza's for the first 9K that's a tough comparison. I haven't owned many M/T's but they are hands down a better tire than the Nitto Mud Terrain in every category. I also had Firestone Destination M/T's on an old Z-71 but it had a loud exhaust so hard to compare road noise. The STT PRO's are definitely lasting longer and are a little better offroad and hands down better on pavement wet or dry. Conclusion: Not 100% sure if I will buy these again or not just because 80-90% of my driving is on pavement so I don't really need the aggressiveness and I miss my brand new super quiet riding truck (and the wife complains about them) but if I do go back with another set of M/T's or extreme terrain type tires these will without a doubt be the tires I buy. May consider the ST MAX or the ATIII. Still undecided as I plan to get another 6 months to a year out of these.
Date published: 2017-02-21
Rated 5 out of 5 by from Lasting better than expected I have had these in a 295-65-20 for 18k miles. They are on a 4 door long bed Ram 2500 4x4 diesel. I pull heavy loaded (10k-25k) gooseneck trailers often and run with 800lbs of diesel in the bed most of the time. They are wearing even (Rotated every 5k) and quieter than most mud's I have run. I drive off-road on job-sites and ranches daily and drive 400-500 miles a week highway and they are holding up good. Had a problem with vibration at first but after 5 different trips to discount they finally got the one causing the shaking road force balanced and all is good now. I would buy these again but from someone else. My other trucks will be getting these when they need tires.
Date published: 2017-02-11
Rated 5 out of 5 by from Cooper STT PRO's If you are in need of a new set of tires for your work truck, jeep or your SUV then consider the Cooper Discoverer STT PRO. It is a versatile, long lasting tire that has a wide range of sizes and is a practical choice for almost any vehicle. I have had two sets of these tires and I have found them to be very quiet, durable, and affordable. Cooper Discoverer STT PRO tires are a great investment and awesome upgrade to my pickup. Road Noise: Most people believe that using off-road tires comes at the sacrifice of a quiet cabin. My past experiences with these tires say otherwise. Yes, these tires will make a little more road noise than AT tires, but that is expected from a more aggressive tire. I have no problem hearing the radio or having a conversation with anyone in my pickup. If road noise is your number one concern when buying new tires and you want as quiet a ride as possible, then you may prefer a less aggressive tire. Durability: I had a set of 285/70/17 on my previous pickup and never had a problem. No nails, no uneven tread-wear, and no blowouts. I drive a lot of gravel and the treads still looked near new with 10,000 miles on them. I was so pleased with their performance that I just recently bought another set of 265/70/17 for my new pickup. I have less than 1,000 miles on this new set, and again, I am very satisfied with their performance. Pricing: The first set I bought were 285’s and priced at $267 per tire. My new set of 265’s were $247 per tire. In my opinion this is a very good price for Cooper Pro’s. They are very competitive in the light truck market as their cost is right in line with a set of highway treads. If you are looking for a high quality tire that you can put on your work truck and run at maximum tire pressure for towing, or put a set of 35’s on your jeep and hit the trails, this tire is versatile enough to do it all. If your needs lean toward an aggressive tire with minimal road noise that doesn’t break the bank and can handle whatever you throw at it, then this is the tire for you.
Date published: 2017-02-09
Rated 4 out of 5 by from Overall great tire. I have put about 11k on these tires and can say I put them through about every type of common terrain with the exception of sand. Pavement (daily), gravel (daily), mud (occasional), snow and ice(occasional). They have performed fantastic in all of it. Ice was not as good as my old wrangler authority tires but the wranglers also had considerably more siping. They have been easy to balance with little weight, road noise isn't to bad and the ride is great. They are at about half tread now so I'm a little disappointed on tread life if all I get is 25k out of them. I will edit or write another review when they reach the end of their life to update the actual miles I get.
Date published: 2017-02-09
Rated 5 out of 5 by from Great tire Another great tire produced by Cooper with an affordable price point. I haven't seen a change in the tread after 8,000 miles. THE REASON,, for most people talking trash on ANY tire is because they wanted the show truck look AND the performance as well. For eg. going outside of the factory engineering with ridiculous offsets and backspacing. Anyone that knows anything about physics knows you can't throw whatever aftermarket wheels on without reading about the consequences first. Not to mention, ignoring proper PSI and poor driving habits. Anyways, you will not be disappointed, definitely worth the money and time spent.
Date published: 2017-02-07
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