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Cooper Discoverer STT PRO
  • Cooper Discoverer STT PRO
  • Cooper Discoverer STT PRO

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The Discoverer STT PRO is Cooper's Off-Road Maximum Traction light truck tire developed for the drivers of pickup trucks, Jeeps and SUVs who want confident, go-anywhere traction without sacrificing on-road performance. The Discoverer STT PRO is designed to provide impressive off-road capability combined with acceptable levels of on-road traction and civility.

Beginning with a robust, chip- and tear-resistant compound, the Discoverer STT PRO is molded into an aggressive, high-void tread pattern. Deep starting tread depths and alternating cleats and scoops in the shoulder lugs enhance traction in mud and other soft terrain, and mud release dimples help the tire self-clean. Anti-stone retention ribs at the base of the tread grooves eject small rocks to assist with preventing punctures due to stone drills. Wide lateral and circumferential channels aid hydroplaning resistance, and in-block siping creates additional biting edges for improved grip in slippery conditions.

The Discoverer STT PRO utilizes Cooper's Armor-Tek3 Construction technology, which features a robust, three-ply polyester casing to improve puncture resistance. Two wide, strong steel belts support the tread and are reinforced by a single nylon cap ply.

While Off-Road Maximum Traction tires, which are often called mud tires, are branded with the M+S symbol and able to churn through deep snow, their typical oversize applications and the relative absence of snow-biting sipes in their large lugs can challenge their on-road wintertime traction on packed snow and icy surfaces.

Tire Rack Test Results Cooper Discoverer STT PRO

Testing Off-Road Maximum Traction Tires 2021: Cooper Discoverer STT Pro (2:21)

The Cooper Discoverer STT Pro brings capable, backcountry traction to the table, but does it have what it takes to compete on the road where many of its rivals are also built to perform?

Read the Full Test Report

Ratings Charts & Reviews Cooper Discoverer STT PRO

Tire Category: Off-Road Maximum Traction

Consumer Surveys

 
Best in Category
Miles Reported
Recommended
Treadwear
Cooper Discoverer STT PRO
Good
95%
1.7M
8.2 - Good
9.3 - Excellent
9.5 Dirt Traction
9.2 Sand Traction
9.3 Mud Traction
9.1 Rock Traction
8.7 - Excellent
8.8 Hydroplaning Resistance
8.7 Wet Traction
9.0 - Excellent
8.8 Corner Stability
9.3 Dry Traction
8.8 Steering Response
8.1 - Good
8.5 Light Snow Traction
8.7 Deep Snow Traction
7.2 Ice Traction
7.5 - Good
8.0 Ride Quality
7.0 Noise
7.7 - Good

Customers Say

Customer feedback data reveals strong performance in dry traction (9-10 scores) and wet traction (7-10 scores), with many users praising their grip and stability in rugged off-road conditions. Winter traction shows high marks for deep snow (8-10 scores) but mixed results on ice (3-10 scores), aligning with its maximum-traction focus. Treadwear receives positive feedback (6-10 scores), though some note variability in longevity under heavy use. Comfort is generally praised for ride quality (7-10 scores), though noise levels (2-10 scores) are a noted trade-off for aggressive off-road capability. Overall, users highlight its off-road prowess and durability in challenging terrain.

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Customers Like:

97 customers mention "Wet Traction"

  • 92 positive
  • 5 negative

Most customers rate the Cooper Discoverer STT PRO's wet traction highly, with scores of 8-10 highlighting excellent grip and hydroplaning resistance. While primarily an off-road tire, it delivers confident wet performance, aligning with its rugged design.

February 12, 2020 (Verified Purchase)

4.8 out of 5 Star Rating
4.8 out of 5

...I never have traction issues. I would recommend these tires to anyone that wants the confidence to get where they are going!!!!...

First of all fast service , #1 in my book, the tires are the best i have ever owned. I plow snow and live on a dirt road. I never have traction issues . I would recommend these tires to anyone that wants the confidence to get where they are going!!!! I'm willing to take a little road noise for great traction.

Vehicle: 2018 RAM 3500 4WD Crew Cab
Miles Driven on Tires: 2,400
Driving Conditions: Combined Off Road/Highway
Location: HAMMONDSPORT, NY
Driving Style: Average
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February 20, 2020 (Verified Purchase)

5 out of 5 Star Rating
5 out of 5

...Rock crawling mixed with wet mud on a 45 deg. incline...didn't even break traction with them aired down to 15psi...

I had a set of (5) 37/11.5/R17's on my 2018 Jeep Wrangler JL Unlimited Rubicon for 45,000+ miles (all 5 rotated every 10,000 miles) in every terrain South Louisiana can through at them. I also made a 3000 mile trip to Gatlinburg, TN to Buffalo, NY then back to New Orleans, LA in 5 days and they preformed flawlessly. These tires are amazing! Quietest road noise of any mud tire out there! They handle exceptional on road in daily driving, my 21 mile (one way) trip to and from work on highway was a Brees. The city roads and even the extreme pot holes on the streets of downtown New Orleans felt non-existent. The Off Road traction and capabilities of these tires are outstanding! Rock crawling mixed with wet mud on a 45 deg. incline...didn't even break traction with them aired down to 15psi. You want a tire that will give you (in my opinion) the best multi purpose use daily...Look no further!

NOTE: This was my first ever set of mud tires, didn't really expect to get 45,000 miles. I really should have rotated them much more often...I started to get some vibration in the front end around 35,000 miles. Now, part of this was do to not having adjustable track bars front and rear of my Jeep when I installed the 2" Mopar lift causing ware and tare. The other part was the tire rotation intervals...had I done them every 3,000 miles, I would have prolonged the life of the tires to 60,000 mile easily and prevented some of the ware and tare on the steering components. The uneven ware caused by the lack of rotations made the vibrations and noise in the tires to much.

Vehicle: 2018 Jeep Wrangler JL Unlimited(All New) Rubicon
Miles Driven on Tires: 45,000
Driving Conditions: Combined Off Road/Highway
Location: DESTREHAN, LA
Driving Style: Spirited
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74 customers mention "Winter Traction"

  • 66 positive
  • 8 negative

The Cooper Discoverer STT PRO excels in snow and deep snow traction, with most scores 8-10. Ice performance shows solid capability (scores 5-10), ideal for off-road winter adventures.

January 25, 2024 (Verified Purchase)

4.2 out of 5 Star Rating
4.2 out of 5

...i use them for going through deep snow. i run them at 15 to 10ish PSI i have had really good luck with them would recommend them if you go through deep snow...

I really like the tires i use them for going through deep snow. i run them at 15 to 10ish PSI i have had really good luck with them would recommend them if you go through deep snow. even at low PSI i haven't had them de-bead.



Vehicle: 1996 Chevrolet Suburban 1500 4wd
Miles Driven on Tires: 2,000
Driving Conditions: Off Road
Location: IDAHO FALLS, ID
Driving Style: Spirited
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January 18, 2023 (Verified Purchase)

4.6 out of 5 Star Rating
4.6 out of 5

...I've driven over snow covered donner summit and never had any trouble with traction...

My second set of the SST Pro's and still am very impressed with the ride comfort, handling in all terrain types, and longevity. Noise is a little loud but that's expected with such an aggressive tire. Constantly get complements on how they look. I got about 55k on my first set. I've driven over snow covered donner summit and never had any trouble with traction. They're on the expensive side but definitely worth the investment.

Vehicle: 2013 Toyota Tacoma 4wd Double Cab
Miles Driven on Tires: 10,000
Driving Conditions: Combined Off Road/Highway
Location: ROCKLIN, CA
Driving Style: Average
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June 29, 2021 (Verified Purchase)

4.1 out of 5 Star Rating
4.1 out of 5

...The traction is unbelievable for rocks, mud, dirt and in deep snow...

Awesome tire I’ve only driven 150 miles on them. The traction is unbelievable for rocks, mud, dirt and deep snow I would definitely recommend these tires for someone who’s looking for a great off road tire.

Vehicle: 1985 Toyota Pick-up 4wd
Miles Driven on Tires: 150
Driving Conditions: Combined Off Road/Highway
Location: RENO, NV
Driving Style: Spirited
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101 customers mention "Dry Traction"

  • 101 positive
  • 0 negative

Outstanding dry traction with most scores 9-10. Customers highlight confident grip and stability in rugged off-road use, aligning with its maximum traction purpose. Occasional 7-8 scores mention minor concerns, but performance excels overall.

March 13, 2019 (Verified Purchase)

4.1 out of 5 Star Rating
4.1 out of 5

...They drive well in wet or dry weather, drive well in light snow, drive well in ice and not too noisy for a mud tire...

This is my second set. I got 40,000 miles out of the first set. I love the tires. They look killer on my truck. They drive well in wet or dry weather, light snow, ice and not too noisy for a mud tire. I haven't had it off road. Make sure to rotate often or tires will cup and you will have vibration issues that balancing won't fix. I will continue to buy these again!

Vehicle: 2015 Toyota Tundra TRD Pro CrewMax
Miles Driven on Tires: 10,000
Driving Conditions: Combined Highway/City
Location: KENNESAW, GA
Driving Style: Spirited
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April 02, 2018

4.9 out of 5 Star Rating
4.9 out of 5

...These are by far the best off-road tires on the market. They can handle every condition thrown at them...

I run the Cooper Discoverer STT Pro tires on both my personal truck (275/55R20) and my off-road race truck (TORC Pro 2 size LT315/70R17). These are by far the best off-road tires on the market. They can handle every condition thrown at them. I would highly recommend this over any competitor in the market. Race and family fun proven!!

Vehicle: 2017 Ford F150 4WD SuperCrew
Miles Driven on Tires: 25,000
Driving Conditions: Off Road
Location: ARGONNE, WI
Driving Style: Spirited
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102 customers mention "Ride Quality"

  • 82 positive
  • 20 negative

Many customers rate ride comfort between 7-10, highlighting smooth handling on rugged terrain. While some note moderate noise levels, scores reflect strong off-road capability without sacrificing comfort.

August 18, 2018 (Verified Purchase)

3.9 out of 5 Star Rating
3.9 out of 5

...These tires are not for the person looking for a smooth and quiet ride... Noisy...but not mud grappler noisy...

This would be my second set of STT PROS. The first set was on my Ram 2500. These tires are not for the person looking for a smooth and quiet ride. I have had no balancing issues with these tires. They look amazing on my truck in my opinion. They are awesome offroad and in the mud. Even when not in 4wd. Really good in the snow. Noisy.......but not mud grappler noisy. I think the good out weighs the bad here. Besides the noise I love these tires but feel they are more at home on an HD truck. My 2 cents. Thanks for reading.

Vehicle: 2014 RAM 1500 4WD Crew Cab
Miles Driven on Tires: 3,000
Driving Conditions: Combined Off Road/Highway
Location: ABERDEEN, MD
Driving Style: Average
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October 31, 2022 (Verified Purchase)

4.1 out of 5 Star Rating
4.1 out of 5

...Noisy, but should be expected with the large mud block design. Much louder when cornering at speed. Absorbs road bumps much better than stock tire and feels more stable...

Great tire! Noisy, but should be expected with the large mud block design. Much louder when cornering at speed. Absorbs road bumps much better than stock tire did (Goodyear) and feels more stable. Would definitely buy again.

Vehicle: 2020 Chevrolet Silverado 2500 HD 4WD Crew Cab
Miles Driven on Tires: 500
Driving Conditions: Combined Off Road/Highway
Location: EAU CLAIRE, WI
Driving Style: Average
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January 23, 2022

3.9 out of 5 Star Rating
3.9 out of 5

...I'd say the biggest sacrifice you need to consider when purchasing this tire is how much do you value quite ride and comfort? Highly recommended running what the vehicle manufacture tire pressure specs are in these tires... After a year i decided to put it back to 32psi and what a difference!!...

Tires looks are second to none! Best looking tire for a truck period. Tire is used for mainly daily driving with the idea of weekend warrior and some. For a daily driver, it's not a bad at all for an off-road tire. I'd say the biggest sacrifice you need to consider when purchasing this tire is how much do you value quite ride and comfort? Highly recommended running what the vehicle manufacture tire pressure specs are in these tires. Place I had install the tires recommended me to run these at 55psi . After a year i decided to put it back to 32psi and what a difference!! I have put about 45,000 on these bad boys and i still have 10.5/32 of tread left. If you like compliments buy these tires!!

Vehicle: 2011 GMC Sierra 1500 4wd Extended Cab
Miles Driven on Tires: 45,000
Driving Conditions: Combined Highway/City
Location: LIVONIA, MI
Driving Style: Average
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95 customers mention "Treadwear"

  • 73 positive
  • 22 negative

Treadwear receives strong ratings, with most customers scoring 8-10 and praising excellent durability in rugged off-road use. While a few lower scores indicate concerns, the majority highlight long-lasting performance perfect for maximum traction needs.

August 11, 2018

4.7 out of 5 Star Rating
4.7 out of 5

...Good looking, long tread wear, puncher resistant... need to be rotated as required...

This tire is great. Everything it promised to be. Good looking, long tread wear, puncher resistant. The only thing I can think off as a negative is they are noisy and need to be rotated as required. I will buy them again and again.

Vehicle: 2008 Ford F150 XLT 4x4 Heavy-Duty 7-Lug
Miles Driven on Tires: 25,000
Driving Conditions: Combined Off Road/Highway
Location: COTTONWOOD, CA
Driving Style: Average
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July 22, 2019

4.2 out of 5 Star Rating
4.2 out of 5

...My STT's have been rotated on every oil change on both rigs and they still look new...

The Best tires I have ever had in my life! Cooper Discoverer STT PRO 315/75R-16 is the only tire I will put on a T-100 4x4 truck or my 4x4 Ford Off-road Adventure RV same size. It has been a life saver in the Extreme ice storm to driving in Deep Sand in the summer to look at property's. I drive from Oregon to Arizona and I will not buy any other tire for my OffRoading to Highway Life. My STT's have been rotated on every oil change on both rigs and they still look new. Thank you Cooper Tire for outstanding new tire technology.

Vehicle: 1995 Toyota T100 4wd
Miles Driven on Tires: 14,288
Driving Conditions: Combined Off Road/Highway
Location: SPRINGFIELD, OR
Driving Style: Average
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December 20, 2022 (Verified Purchase)

3.4 out of 5 Star Rating
3.4 out of 5

...Tread wear has been good so far, bought them do to tread design and size was out of stock in my preferred brand, will probably not buy again unless unable to get the brand I want...

Do not balance well, have had them balanced twice now. First 4k miles feels like you're driving on ice, vehicle wanders a lot, starts to settle down after some miles on them, still won't balance though. Tread wear has been good so far, bought them do to tread design and size was out of stock in my preferred brand, will probably not buy again unless unable to get the brand I want. Definitely not the worst tire I have owned, but far from what I expected at the price.

Vehicle: 2018 GMC Sierra 3500 HD 4WD Single Rear Wheel
Miles Driven on Tires: 6,000
Driving Conditions: Combined Off Road/Highway
Location: EUREKA, NV
Driving Style: Average
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Consumer Reviews

Media Gallery

Testing Off-Road Maximum Traction Tires 2021: Cooper Discoverer STT Pro (2:21)

The Cooper Discoverer STT Pro brings capable, backcountry traction to the table, but does it have what it takes to compete on the road where many of its rivals are also built to perform?

Read the Full Test Report

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