Discoverer STT PRO™

Fits Trucks/Pickups All-Season

Discoverer STT PRO™ is rated 4.6 out of 5 by 76.
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Standard Limited Warranty

The Discoverer STT PRO™ is the most extreme all-season, off-road tire Cooper® offers to date, providing remarkable off-road performance without sacrificing on-road traction.

  • Tread design helps to prevent stone retention
  • Armor Tek3® Construction for added tire durability
  • The shoulder of the tire was designed with soft surface "cleats" and mud "scoops"

M+S Rated

Features

Dry Performance

The tire’s ability to grip the road in dry conditions.

Wet Performance

The tire’s ability to grip the road in wet conditions.

Tread Wear

The wear rate of the tire.

Quiet Ride

The measure of how quiet a tire is while driving.

Handling

How the tire is able to respond to driving such as accelerating, braking, steering and turning.

Off Road

The tire’s ability to have grip on unpaved surfaces such as dirt, mud, sand, rock or gravel.

*When compared to other Cooper® tires.

Tire Design

  • 3-2 Inner Tread Ribs

    Unique hybrid 3-2 tread pattern reduces noise and increases stability.

  • Alternating Shoulder Lugs

    Enhance traction in mud and soft surfaces.

  • Anti Stone Retention

    Resists stone retention which helps to increase the life of the tire.

  • Mud Relase Dimples

    Aid in keeping the read pattern free of loose soil.

Full Specs

Tire Size Service Description UTQG Load Range Sidewall Approved Rim Width Measured Rim Width Section Width Overall Diameter Tire Weight Max Load Tread Depth (1/32")
30X9.50R15LT 104Q C RWL 6.5 - 8.5 7.5 9.6 29.57 44 1985 19
31X10.50R15LT 109Q C RWL 7 - 9 8.5 10.7 30.75 48 2270 20
32X11.50R15LT 113Q C RWL 8 - 10 9 11.7 31.57 53 2535 20
33X12.50R15LT 108Q C RWL 8.5 - 11 10 12.2 32.72 60 2205 21
35X12.50R15LT 113Q C RWL 8.5 - 11 10 13.1 34.57 67 2535 21
LT215/85R16 115\112Q E BLK 5.5 - 7 6 8.5 30.59 42 2680 18.5
LT235/85R16 120\116Q E BLK 6 - 7.5 6.5 9.6 31.89 49 3042 18
LT225/75R16 115\112Q E BLK 6 - 7 6 8.9 29.49 43 2680 18
LT245/75R16 120\116Q E BLK 6.5 - 8 7 9.6 30.71 47 3042 18
LT265/75R16 123\120Q E RWL 7 - 8 7.5 10.7 31.89 54 3415 18.5
LT285/75R16 126\123Q E RWL 7.5 - 9 8 11.2 32.99 61 3750 19
LT315/75R16 127\124Q E RWL 8 - 11 8.5 12.6 34.53 69 3860 20.5
LT305/70R16 124\121Q E RWL 8 - 9.5 9 12.3 32.99 62 3525 19.5
LT255/75R17 111\108Q C RWL 6.5 - 8.5 7 10.3 31.89 51 2405 19
LT265/70R17 121\118Q E RWL 7 - 8.5 8 10.7 31.93 55 3195 18.5
LT285/70R17 121\118Q E RWL 7.5 - 9 8.5 11.5 33.03 62 3195 19
LT295/70R17 121\118Q E RWL 7.5 - 10 8.5 12 33.46 66 3195 21
LT315/70R17 121\118Q E RWL 8 - 11 9.5 12.6 34.57 66 3195 21
LT305/65R17 121\118Q E BLK 8.5 - 11 9 12.3 32.68 64 3195 21
37X12.50R17LT 124Q D BLK 8.5 - 11 10 13 36.77 75 3525 22
37X13.50R17LT 121Q E BLK 8.5 - 11 11 13.3 36.77 81 3195 22
40X13.50R17LT 121Q C BLK 8.5 - 11 11 13.6 39.76 91 3195 22
LT275/70R18 125\122P E RWL 7 - 8.5 8 11.3 33.31 63 3640 20
LT295/70R18 129\126P E RWL 7.5 - 10 8.5 12 34.49 69 4080 21
LT305/70R18 126\123Q E RWL 8.5 - 10 9 12.4 35.08 71 3750 21
LT275/65R18 123\120Q E RWL 7.5 - 9 8 10.9 32.28 59 3415 19
LT285/65R18 125\122Q E RWL 8 - 10 8.5 11.8 32.91 63 3640 19
LT325/65R18 127\124Q E RWL 9 - 12 9.5 13.7 34.69 78 3860 21
LT305/60R18 121\118Q E RWL 8.5 - 11 9 12 32.68 65 3195 21
37X13.50R18LT 124Q D BLK 8.5 - 11 11 13.3 36.77 82 3525 22
38X15.50R18LT 128Q D BLK 11 - 13 12 15.4 37.87 94 3970 21
LT275/65R20 126\123Q E BLK 7.5 - 9.5 8 10.9 34.49 63 3750 19.5
LT295/65R20 129\126Q E BLK 8 - 10 8.5 11.7 35.43 69 4080 19.5
LT295/60R20 126\123Q E BLK 8 - 10 8.5 11.5 34.29 66 3750 19.5
LT295/55R20 123\120Q E BLK 8 - 10 9.5 12.3 33.07 65 3415 20
LT305/55R20 121\118Q E BLK 8.5 - 11 9.5 12.4 33.5 69 3195 20.5
35X12.50R20LT 121Q E BLK 8.5 - 11 10 12.4 34.69 69 3195 21
37X12.50R20LT 126Q E BLK 8.5 - 11 10 12.6 36.69 77 3750 21
35X13.50R20LT 122Q E BLK 8.5 - 11 11 13.2 34.57 76 3305 21
37X13.50R20LT 127Q E BLK 8.5 - 11 11 13.3 36.85 83 3860 21
38X13.50R20LT 123Q D BLK 8.5 - 11 11 13.6 38.19 84 3415 21
38X15.50R20LT 128Q E BLK 11 - 13 12 15.4 37.83 94 3970 21
LT325/50R22 122Q E BLK 9 - 12 10 12.9 35.12 77 3305 21
35X12.50R22LT 117Q E BLK 8.5 - 11 10 12.3 34.76 72 2835 21
37X13.50R22LT 123Q E BLK 8.5 - 11 11 13.4 36.89 82 3415 21

Reviews

Rated 5 out of 5 by from Great on/off road use Installed on 2014 F-350 4X4, SRW. 1st set of tires since the OEM Michenlin's. Wanted something aggressive with good off road characteristics as I often am towing heavy trailers in light to moderate off road scenarios. OEM's had let me down more than once. Went from no hwy noise on OEM's to some with these, but to be expected. Not the loudest I've heard but some noise and it's new to me. They really look good on OEM wheels and look right at home on the stock Platinum. Ran them off road in some mud and terrain that I know the old tires would not have liked. Walked right through it in 2WD, no issues. Very happy with them to this point and expect they won't disappoint.
Date published: 2018-01-18
Rated 5 out of 5 by from Replacing OEM JK Rubicon tire In replacing the stock JKR tire, or going up in size, this tire has a more aggressive look and better performance. OEM tire would way understeer in water and on ice. The STT Pro holds very well in both. Tread sheds snow and mud easily. And I have yet to put it in 4wd for any of this weather. Road hum is a different sound but not louder than OEM. Ride is comfortable and handling is responsive. Great tire.
Date published: 2018-01-08
Rated 5 out of 5 by from Best Off Road Tire available. These are hands down the best off road tires on the market. Superior design, and great traction in the snow. Remarkably well mannered on pavement and not that noisy.
Date published: 2018-01-07
Rated 5 out of 5 by from Great grip for off-road Absolutely the best tire I've ever ran on my Jeep. I recommend them to all my friends and they've purchased them as well.. It would be great if they'd offer them in a 15 inch so I don't have to buy new rims to fit 40 inch tire I want..
Date published: 2017-12-30
Rated 5 out of 5 by from BEST TRUCK TIRES ON EARTH I have tried all the "TOP" brand truck tires and these are perfect. I have 37x12.50x20 on a GMC 2500HD 4x4 with a 6" lift. I drive in every kind of terrain on the east coast. A LOT of highway miles as well as the nastiest mud/rock/sand in swamps to steep mountains. They handle great in all conditions. I drive my truck like I stole it everywhere I go. I maintain about 90 mph on the interstate and if the road is good, the ride is like a Cadillac. I have over 50,000 miles on mine andI will be ordering another set soon. READ THIS: After a few thousand miles I discovered and gambled by getting rid of the lead wheel weights and pouring 10 ounces of ceramic balancing beads in each tire. My tires have worn perfectly and they never need balanced! I don't know why the world still uses the old weight system? ....these tires are AMERICAN MADE TOO!!!
Date published: 2017-12-30
Rated 5 out of 5 by from Excellent Tires 2008 Jeep Rubicon, these are by far the best tires I've ever had !!!!
Date published: 2017-12-28
Rated 4 out of 5 by from Looks and preforms excellent I've put about 30-35k miles on these and the tread on them look great. I live in AZ, and I enjoy the out doors. These tires take me anywhere I want to like, Rocky roads, soft sand washes, and playing in the mud. Even on the city roads the noise is minimal . (I have NOT been in snow with these tires yet.)
Date published: 2017-12-28
Rated 5 out of 5 by from Excellent tire Toyota 4 runner loves these tires. My preferred standard for the last 25 yearsb was BF Goodrich AT and Mud Terrain on everything i owned. When i bought a used 4 runner these tires were already on it new, so i gave them a 2000 mile test drive. The high void pattern sticks to the road in the light toyota and its almost as quiet as BF Goodrich Mud Terrain...but doesn't load up with mud as easily. These tires are now my personal choice for aeveral reasons an old Jeeper would appreciate. They are tough , quiet, and wear well.
Date published: 2017-12-25
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Warranty

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