Discoverer S/T MAXX™

Fits Trucks/Pickups All-Season

Discoverer S/T MAXX™ is rated 4.4 out of 5 by 100.
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Standard Limited Warranty
Studdable

The Discoverer S/T MAXX™ is designed for tough terrain, including rocks and gravel, with on-road stability and performance.

  • Tread design helps to prevent stone retention
  • Armor Tek3® Construction for added tire durability
  • Cut and Chip resistant tread compound/composition

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

  • Hybrid 4-5 Ribe Design

    Provides low tread pattern noise and even wear.

  • Dual-Draft and Non-Parallel Groove Walls

    Help reduce stone retention and resist cutting and chipping.

  • Stone Ejector Ribs

    Help discharge debris and resist stone retention.

Full Specs

Tire Size Service Description UTQG Load Range Sidewall Approved Rim Width Measured Rim Width Section Width Overall Diameter Tread Width Tire Weight Max Load Tread Depth (1/32")
30X9.50R15LT 104Q C BLK 6.5 - 8.5 7.5 9.3 29.69 7.68 44 1985 18.5
31X10.50R15LT 109Q C BLK 7 - 9 8.5 10.7 30.75 8.35 49 2270 18.5
33X12.50R15LT 108Q C BLK 8.5 - 11 10 12.6 32.76 9.88 58 2205 18.5
35X12.50R15LT 113Q C BLK 8.5 - 11 10 12.2 34.45 10.31 66 2535 18.5
LT215/85R16 115\112Q E BLK 5.5 - 7 6 8.4 30.31 6.22 38 2680 18.5
LT235/85R16 120\116Q E BLK 6 - 7.5 6.5 9.5 31.97 7.4 51 3042 18.5
LT255/85R16 123\120Q E BLK 6.5 - 8 7 10.2 32.8 8.15 58 3415 18.5
LT225/75R16 115\112Q E BLK 6 - 7 6 8.9 29.49 7.01 46 2680 18.5
LT245/75R16 120\116Q E BLK 6.5 - 8 7 9.7 30.67 7.8 49 3042 18.5
LT265/75R16 123\120Q E OWL 7 - 8 7.5 10.5 32.01 8.46 55 3415 18.5
LT285/75R16 126\123Q E OWL 7.5 - 9 8 11.7 32.91 9.29 62 3750 18.5
LT315/75R16 127\124Q E BLK 8 - 11 8.5 12.5 34.45 10 67 3860 18.5
LT245/70R16 118\115Q E BLK 6.5 - 7 7 9.8 29.53 7.52 47 2910 18.5
LT265/70R16 121\118Q E BLK 7 - 8.5 8 10.9 30.87 8.7 54 3195 18.5
LT305/70R16 124\121Q E BLK 8 - 9.5 9.5 12 33.07 10 63 3525 18.5
LT235/80R17 120\117Q E BLK 6 - 7.5 6.5 9 32.01 7.4 51 3085 18.5
LT255/80R17 121\118Q E BLK 6.5 - 8.5 7 10.2 32.8 8.15 58 3195 18.5
LT245/75R17 121\118Q E BLK 6.5 - 7.5 7 9.4 31.54 7.72 52 3195 18.5
LT255/75R17 111\108Q C BLK 6.5 - 8.5 7 10.2 31.77 8.15 55 2405 18.5
LT285/75R17 121\118Q E BLK 7.5 - 9.5 8 11.1 34.06 9.21 65 3195 18.5
LT245/70R17 119\116Q E BLK 6.5 - 8 7 9.6 30.71 7.6 49 3000 18.5
LT265/70R17 121\118Q E OWL 7 - 8.5 8 10.7 31.85 8.7 57 3195 18.5
LT275/70R17 121\118Q E BLK 7 - 8.5 8 11 32.17 8.86 59 3195 18.5
LT285/70R17 121\118Q E OWL 7.5 - 9 8.5 11.5 32.99 9.29 62 3195 18.5
LT295/70R17 121\118Q E BLK 7.5 - 10 8.5 12 33.23 9.8 64 3195 18.5
LT315/70R17 121\118Q D BLK 8 - 11 9.5 12.8 34.57 10 66 3195 18.5
LT265/65R17 120\117Q E BLK 7.5 - 9.5 8 10.7 30.51 8.66 53 3085 18.5
LT305/65R17 121\118Q E BLK 8.5 - 11 9 12.3 32.64 10 64 3195 18.5
37X12.50R17LT 124P D BLK 8.5 - 11 10 13.1 36.89 10.35 79 3525 18.5
LT265/70R18 124\121Q E BLK 7 - 9 8 10.7 32.87 8.62 58 3525 18.5
LT275/70R18 125\122Q E BLK 7 - 8.5 8 11.1 33.39 9.02 61 3640 18.5
LT295/70R18 129\126Q E BLK 7.5 - 10 8.5 12 34.25 9.69 67 4080 18.5
LT305/70R18 126\123Q E BLK 8.5 - 10 9 12.5 35.08 10 70 3750 18.5
LT265/65R18 122\119Q E BLK 7.5 - 9.5 8 10.7 31.81 8.62 56 3305 18.5
LT275/65R18 123\120Q E BLK 7.5 - 9 8 10.8 32.2 8.66 58 3415 18.5
LT285/65R18 125\122Q E BLK 8 - 10 8.5 11.8 32.8 9.29 63 3640 18.5
LT265/60R18 119\116Q E BLK 7.5 - 9.5 8 10.7 30.75 8.62 54 3000 18.5
LT285/60R18 122\119Q E BLK 8 - 10 8.5 11.8 31.65 9.49 61 3305 18.5
LT305/60R18 121\118Q E BLK 8.5 - 11 9 12.1 32.64 10 66 3195 18.5
LT275/65R20 126\123Q E BLK 7.5 - 9.5 8 11.1 34.17 8.98 65 3750 18.5
LT265/60R20 121\118Q E BLK 7.5 - 9.5 8 10.7 32.76 8.62 59 3195 18.5
LT285/60R20 125\122Q E BLK 8 - 10 8.5 11.3 33.62 9.17 63 3640 18.5
LT285/55R20 122\119Q E BLK 8 - 10 9 11.7 32.6 9.29 61 3305 18.5
LT295/55R20 123\120Q E BLK 8 - 10 9.5 12.1 32.95 10.2 65 3415 18.5
LT305/55R20 121\118Q E BLK 8.5 - 11 9.5 12.2 33.43 10.28 69 3195 18.5
35X12.50R20LT 121Q E BLK 8.5 - 11 10 12.5 34.65 10 69 3195 18.5

Reviews

Rated 5 out of 5 by from AWSOME TIRE 265/75R16 S/T MAXX, HAD THIS TIRE ON MY 1972 CHEVY 4X4 3/4 TON WITH NO ISSUES. GREAT LOOKING TIRE PLUS THEY HANDLE GREAT IN THE SNOW ,ICE AND ON THE HIGHWAY WITH NO ROAD NOISE ON THE HIGHWAY WHAT SO EVER HAD PUT 40,000 MILES ON TIRES, SOLD TRUCK AND MOUNTED TIRES ON MY WIFE'S 2006 HUMMER H3 AND HAVE HAD NO ISSUES AT ALL AND HAVE ABOUT 60,000 MILES ON THE TIRES NOW AND HAVE ABOUT 50% TREAD LEFT. WILL BE PUTTING THE SAME TIRES ON MY 2001 GMC 2500HD DURAMAX.
Date published: 2018-09-07
Rated 5 out of 5 by from Solid tire! 2018 Ram 3500 Laramie w/stock 18" rims and a 1.75" level with ST Maxx 295x70xr18. Load rating E. These tires are great and very comparable to the BFG or Toyo tires but last a lot longer. The tires don't rub anywhere and rock in the snow. The Load rating on this particular tire is awesome too. 4,080 pounds. There is a little bit of road noise but nothing like a annoying mud tire. I'd buy another set. Good Luck!
Date published: 2018-08-18
Rated 4 out of 5 by from Not great for constant highway use I purchased a set of these Cooper ST Maxx tires for my 2014 Ram 1500 4x4 with a leveling kit. I’ve got to say...they look GREAT! It’s just what I pictured in my head...35s with stock 20” chrome rims...perfect. Well, almost. These tires were very difficult to balance...I was hoping for a better quality tire from USA made Cooper. My truck looks great but rides...well...like a truck. They are also noisy on the highway, which is 95% of my driving. I know what you are going to say...it’s the wrong tire for you...but they look so good! Also, I have a set of STTs on my Jeep, with no vibration problems or issues. Noisy, yes, but it’s a full on mud tire. These are supposed to be a “hybrid “, using the “latest technology”. Handles like a mud tire to me...but they look so GOOD!
Date published: 2018-08-11
Rated 4 out of 5 by from Great looking tire just wears fast for heavy loaded trucks Swapped out the factory Goodyear tires that came on the truck at around 300 miles. Currently have 10,885 miles on the truck. Tread depth is at 13/32. Wear is very even, ride, noise and handling all great, it’s just a shame the tread wear has been so fast. At this rate life expectancy is probably going to be 25,000 to 30,000 miles tops. I will say approximately 7500 miles of the total mileage on the truck, I have been pulling a trailer. Maybe my expectations are to much, but I want to consider Cooper a premium brand like Michelin, and 40,000 to 60,000 miles out of a truck tire is the expectation from most consumers. Yes I will try Cooper products again in the future, next tire will probably be the new AT3 XLT, carries a 60,000 tread life warranty. And S/T Max will probably go 60,000 miles on a 1/2 ton, it just appears that maybe there are better options for HD truck owners.
Date published: 2018-07-18
Rated 4 out of 5 by from Very Good Tire I work in the oil field and ive used this tire on my '09 Silverado 2500HD here in south texas. I drive 90% on gravel roads and they've last me exactly 10 mos/ 31K miles, this is the tire that has giving me more miles out of them. Now I have a '18 Colorado and this are the tires I will use.
Date published: 2018-07-06
Rated 5 out of 5 by from 2000 Silverado 2500 4WD Replaced OEM tires at 28k with the early-on Discoverer STs then the ST MAXX. Vehicle at 106k miles without a flat off-road including countless hunting trips in NV, UT, CO and WY. I seasonally haul a lot of hunting gear and equipment under a 450-lb HD camper shell. Plus having the same tire for natural resources agency work for years without a flat off-road. Also had the Discoverer STTs (correct name?) on a prior 1972 Chevrolet 4WD for years: no flat Scores of thousands of miles off-road including rocky terrain for work and personal vehicles. Probably the best off-road tire made. All these tires were rotated at 3 to 4k miles.
Date published: 2018-06-23
Rated 5 out of 5 by from Awesome I have been using these tires for three years now, have 50,000km on them probably will get close to 60,000km by the time they are done. Running 295/70R18 on a 2011 Ram 3500 SRW 4x4. They are quiet and great traction on anything but probably a 5/10 on ice.
Date published: 2018-06-20
Rated 5 out of 5 by from Best in between tire I've had these tires on my 93 f150 for 12000 miles and the wear is on par with old Yokohama geolander A/T that went 79000 miles and 15years. Been in light mud and dirt gravel; most impressive though is handling in standing water at speed they give absolute confidence with no felt wobble or slip.I love the fact the still make 31x10.50 and also Tha made in USA logo. Here to a hopefull 67000 extra miles.
Date published: 2018-05-24
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