Light Truck Tires

Discoverer STT PRO

Discoverer STT PRO™ is rated 4.4 out of 5 by 44.
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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 One of The Best if Not Best I Have Owned I purchased a set for my 2013 4x4 2500HD Duramax 18,000 miles ago and have been extremely pleased with the tire. They have worn evenly and stayed balanced, 3/4 ounce is the most out of balance in a 5,000 mile span. Over 33 years of truck ownership I have not had a tire that has performed and worn like these have done. I have a little over half tread left and expect to get 36K-40K out of this set of tires. Like any mud tire they are loud due to the large voids in the tread. Different pavement types make the noise louder or softer. If you want a great tire and understand that you will get noise with a mud tire I recommend these for your next purchase!
Date published: 2017-06-04
Rated 5 out of 5 by from Excellent first impression!! I have 35x12.50x20 on stock wheels from a 2015 Ford F350. My truck is a 2008 F250 4x4 diesel. There is no clearance issues with a 6 inch lift. These tires are SHOCKINGLY quite. I had much more road noise with the Nito Terra Grapplers. I also have a marked improvement in steering response. The aggressive look is just what I wanted and these tires really deliver. Just shy of 300 miles, and I am SUPER happy with my choice so far. I will post another review after a few thousand miles of wear, and some time off road and in rain/snow. This is a very heavy truck and that will effect them too I'm sure.
Date published: 2017-05-10
Rated 5 out of 5 by from Over 50,000 miles I have a 2010 Explorer Sport Trac, had a lift kit installed and increased to 32 inch tires. am told it is the max lift and tire useable on this model with out redesigning the suspension since it is 4 wheel independant suspension. I live in the Seattle area and have many trips down to California and Arizona on the 50,ooo miles. Handles Snow and off road excellent traction. Still have close to half the tread depth. As the wear increases, the sound increases in howl on the highway.....still runs smooth and has very responsive touch at speed. When off road, the tread never even noticed snow or mud while in 4 x and with some experience driving off road I have all the confidence in going where I want to......handles sand well too.
Date published: 2017-04-18
Rated 5 out of 5 by from Outstanding off road tire Not much to say but I purchased a set back in october of 2015 and since then I have put almost 60,000 miles on them. Which in my view is almost in heard of by a aggressice off road tire like this. In a delivery driver so I drive about 150 miles a day with these.. I absolutely love these tires. My truck is a 2wd as well and the cooper stt pros make it power through just about anything.
Date published: 2017-04-06
Rated 5 out of 5 by from great tire 295/65r20 on stock rims. 2012 F350 4x4. 2" leveling kit, dual steering stabilizers. 31,000 miles and tires are at 12/32 on all four corner. No cupping or feathering. Rotate tires and balance at 5,000 miles. Run 70psi on all 4 tires except when towing 5th wheel RV and pump rears up to 80psi. Unbelievable wear for a mud tire and are not squirmy pulling 16,000lb RV. I am running air bags on rear and this does make a world of difference. Run a lot of dirt and gravel roads as well highway. Great tire for off road on pipeline. They just work. Keep the balanced and run them like you stole them.
Date published: 2017-04-03
Rated 1 out of 5 by from DO NOT BUY IS YOU HAVE A DIESEL My truck is rated at over 9,000lbs empty which is the average weight from factory for any F250 diesel. And is also considered the heaviest light duty truck out of any manufacture. These tires wear faster on my truck than any tire I have ever used. Discount tire talked me into throwing these on my truck when in reality they serve a better purpose for 1/2 ton gas trucks or jeeps. This is not recommened for a diesel pickup tire, especially when towing 30,000 pounds. What a waste of $2,000 which was only four tires that lasted me half a year before they were bald. They have no tread warranty either because they are a mud tire. I do not tow very often but when I do its heavy and they can not take it. I have been stuck in the mud on a construction site with out any trailer hooked up multiple times. Just with how heavy a truck is I guess nothing can save it.
Date published: 2017-03-19
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
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