Discoverer® AT3 LT™

Fits Trucks/Pickups All-Season

Discoverer AT3 LT™ is rated 3.8 out of 5 by 26.
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Standard Limited Warranty
Free 45-Day Test Drive
96,000 km Treadwear Protection

The Discoverer® AT3 LT™ with Durable Tread Technology™ haul heavy loads with less wear and are built to withstand ongoing assault from dirt and gravel.

  • Designed to prevent shredding on rocky and gravel terrain
  • Extreme durability for hauling
  • Stops on average at least 10 feet shorter on wet roads*


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.


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

  • Even Wear Arc Technology™

    Tire shape engineered to strategically balance pressure at the tire-to-road contact area promoting even on-road treadwear and superior handling.

  • Whisper Grooves™

    The "Whisper Groove™" provides a sound barrier that reduces road noise.

  • Stone Ejector Ledges

    Ledges easily eject stones and gravel, protecting the tire from stones drilling into carcass and maintaining a clean tread for enhanced road traction.

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")
LT215/85R16 115\112R E BLK 5.5 - 7 6 8.4 30.31 5.98 38 2680 16.5
LT235/85R16 120\116R E BLK 6 - 7.5 6.5 9.4 31.77 6.69 43 3042 16.5
LT225/75R16 115\112R E BLK 6 - 7 6 8.5 29.33 7.01 39 2680 16.5
LT245/75R16 120\116R E OWL 6.5 - 8 7 9.7 30.35 7.52 44 3042 16.5
LT265/75R16 123\120R E OWL 7 - 8 7.5 10.6 31.61 7.8 51 3415 16.5
LT265/75R16 112\109R C OWL 7 - 8 7.5 10.5 31.61 7.8 48 2470 16.5
LT245/70R16 118\115R E OWL 6.5 - 7 7 9.8 29.53 7.87 43 2910 16.5
LT265/70R16 121\118R E OWL 7 - 8.5 8 10.9 30.63 8.58 47 3195 16.5
LT235/80R17 120\117R E OWL 6 - 7.5 6.5 9.2 31.77 6.69 43 3085 16.5
LT225/75R17 116\113R E BLK 6 - 7.5 6 8.7 30.35 7.01 41 2755 16.5
LT245/75R17 121\118S E OWL 6.5 - 7.5 7 10 31.5 7.64 47 3195 16
LT245/70R17 119\116S E OWL 6.5 - 8 7 9.8 30.55 7.87 45 3000 16.5
LT265/70R17 121\118S E OWL 7 - 8.5 8 10.9 31.65 8.62 50 3195 16.5
LT265/70R17 112\109S C OWL 7 - 8.5 8 10.6 31.57 8.62 47 2470 16.5
LT275/70R17 121\118R E OWL 7 - 8.5 8 11 32.17 8.86 52 3195 16.5
LT265/65R17 120\117R E OWL 7.5 - 9.5 8 10.7 30.51 8.7 47 3085 16
LT275/65R17 121\118S E OWL 7.5 - 9.5 8 11 31.1 8.9 50 3195 16
LT285/65R17 121\118S E OWL 8 - 10 8.5 11.5 31.57 9.41 52 3195 16
LT265/65R18 122\119R E BLK 7.5 - 9.5 8 10.7 31.54 8.7 48 3305 16
LT275/65R18 123\120S E OWL 7.5 - 9 8 11.1 32.09 8.9 54 3415 16
LT265/60R18 119\116S E BLK 7.5 - 9.5 8 10.7 30.51 8.78 49 3000 16


Rated 4 out of 5 by from Really liking them so far! I bought these as my main winter tires. I do a lot of highway miles for work and pleasure, but also a fair amount of wet weather driving, snow, and dirt roads for fun. I am liking the way these tires perform! They are smooth and quiet on the highway, but definitely do well on wet roads and snow too. I took them 4-wheeling a month ago, and tackled a pretty tough old mining road with a lot of sharp rocks. I even managed to get a deep and long gash on the side-wall. The tire didn't fail, and I drove it 500 miles home! Not sure how they will wear in the long run, since I've only had them for a few months, but so far very happy..:-)
Date published: 2020-01-11
Rated 2 out of 5 by from Noisiest AT I've ever owned. 2007 Duramax 4x4. 265/75-16E on the stock 16x6.5 wheel. Was eager to try my first Cooper, as it is made in the USA. This is an otherwise good tire, but the noisiest AT I've ever owned. Fortunately, my dealer Dixon Tire Pros is awesome and he took care of it. I took them back and had them swapped for the HT3... we will see how that goes. I was bummed, because balance and handling seemed very good, and I liked the look of the tires installed. Unfortunately, there was a hum from 35-60mph and a bad harmonic at 55mph that I just couldn't put up with. This AT3 replaced a Nitto Ridge Grappler that was also noisy, but less annoying in it's sound. Previous quieter AT's I've had: Yokohama Geolander, Goodyear Wrangler, BFG All-Terrain, to name a few.
Date published: 2020-01-07
Rated 1 out of 5 by from Good tires for a minute... I liked these tires at first. Quiet, good traction, comfy ride. However, driving 12k miles a year they've only lasted me 2.5 years.... For $1400 I'm very disappointed in the life of these tires. I'm sure they're great on a lighter pickup but I wouldn't put them on a heavier vehicle. I think they're too soft. Which is why I don't buy Les Schwab tires... They don't last. If I spend 1400 on tires, I expect them to last... I'm not real excited about buying new tires already.... No complaints at all about Tire Rama in Missoula! They're great to work with....
Date published: 2020-01-04
Rated 5 out of 5 by from Very Happy with My Purchase I research tires for weeks and narrowed it down to Cooper & BFD. I was looking for a heavier ply tire than originally came on my 2009 Chevy Silverado 1500, an all terrain tire that would not kill my gas mileage, quiet on the road and still perform off road in gravel, mud and snow. I have driven the tire about 500 miles on wet and dry pavement and it handles great with no noticeable road noice and gas mileage is the same as it was with original tires. I drove in a heavy rainstorm with allot of standing water, absolutely no hydroplaning, handled great. I haven't driven in snow or mud, but a videos and people I have talked to the tire perform very well. I will follow up with another review after next years hunting season. Why did I purchase Cooper tires, because of the reviews and price, better reviews and a better value than other brands. Made in the USA!!!!
Date published: 2020-01-03
Rated 5 out of 5 by from Cooper tires never failed us I've bought a set of discoverer AT3s 265/75R16 for my 2000 Excursion v10 2wd. We had Firestone At and Bfs on it before running the AT3s and it's like night and day difference. Tires clean out easy an handles gravel roads nicely and off the road.
Date published: 2019-12-10
Rated 5 out of 5 by from Great all around tire. I've had these tires for over two years now and have not had any problems with them yet. They are on a 2012 Toyota Tacoma 4x4 that I use daily and have to depend on to get me through any type of weather. These tires have worked extremely well in all types of road conditions to include off road.
Date published: 2019-12-09
Rated 5 out of 5 by from Great value and performance! Made in USA! I'm on my 3rd set of Cooper AT3s for my 2012 Chevy Silverado 3500HD Duramax dually, now at 155,000 total miles. I work these tires pretty hard, sometimes towing a 12,000 lb 5th wheel and other times carrying a 4,800 lb Arctic Fox truck camper, most recently to Alaska from New Hampshire and back. I've never had a failure, they run quiet and wear very well. I do rotate every other oil change, check pressure frequently, and stay on top of alignment and suspension services. I like that these are US built too. I'll be buying my next tires from Cooper.
Date published: 2019-12-01
Rated 1 out of 5 by from Worst Tires I’ve Ever Owned These things are terrible. All of mine leak because the beads don’t seal so I’m constantly adding air about every three days. They are EXTREMELY noisy to the point where I can’t stand to drive my vehicle long distances anymore. And the fuel efficiency on my Jeep Grand Cherokee went down 3+ MPG when I had these installed. Never again.
Date published: 2019-10-13
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Standard Limited Warranty
Free 45-Day Test Drive
96,000 km Treadwear Protection

Download the 2020 Consumer Replacement Tire Guide, Limited Warranty & Registration Booklet.


60 Discoverer® AT3 LT™
  • Wet stopping distance based on the results for the Discoverer® AT3 XLTTM LT275/70R18 in comparative wet braking testing against four select competitor tires, April 2018. Individual on-road results may vary.