Discoverer AT3 XLT™

Fits Truck All-Season

Discoverer AT3 XLT™ is rated 4.5 out of 5 by 64.
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Standard Limited Warranty
Free 45-Day Test Drive
60,000 Mile Treadwear Protection - LT-metric sizes

The Discoverer AT3 XLT™ with Durable Tread Technology™ hauls heavy loads with less wear and are built to withstand ongoing assault from dirt and gravel. Available in larger sizes.

  • Designed to prevent shredding on rocky and gravel terrain
  • Extreme durability for hauling
  • Rugged, biting edges on the shoulder of the tire, for extra grip and resistance to punctures
  • Stops on average at least 10 feet shorter on wet roads*

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

  • 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.

  • Rugged Traction Shoulders

    Rugged traction shoulders provide increased off-road traction for boulder crawling and mud handling as well as additional resistance to abrasion and punctures.

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")
31X10.50R15LT 109R C RWL 7 - 9 8.5 10.6 30.2 8.31 44 2270 16.5
32X11.50R15LT 113R C RWL 8 - 10 9 11.6 31.42 9.09 48 2535 17
33X12.50R15LT 108R C RWL 8.5 - 11 10 12.6 32.36 9.69 54 2205 17
LT285/75R16 126\123R E RWL 7.5 - 9 8 11.6 32.56 8.9 54 3750 17
LT295/75R16 128\125R E RWL 7.5 - 9.5 8 11.9 33.35 9.21 58 3970 17
LT315/75R16 127\0R E RWL 8 - 11 8.5 12.4 34.49 9.8 64 3860 17
LT305/70R16 124\121R E RWL 8 - 9.5 9 12.2 32.72 9.69 57 3525 17
LT285/75R17 121\118S E BLK 7.5 - 9.5 8 11.5 33.82 8.9 58 3195 17
LT285/70R17 121\118S E RWL 7.5 - 9 8.5 11.4 32.83 9.09 56 3195 17
LT295/70R17 121\118R E RWL 7.5 - 10 8.5 11.9 33.35 9.41 58 3195 17
LT305/70R17 121\118R E BLK 8 - 9.5 9 12.2 33.86 9.8 61 3195 17
LT315/70R17 121\118S E RWL 8 - 11 9.5 12.6 34.33 10 64 3195 17
37X12.50R17LT 124R D BLK 8.5 - 11 10 12.5 36.54 10 68 3525 18
LT285/75R18 129\126S E BLK 7.5 - 9.5 8 11.5 34.84 8.9 60 4080 17
LT265/70R18 124\121S E RWL 7 - 9 8 10.7 32.64 8.62 53 3525 16.5
LT275/70R18 125\122S E RWL 7 - 8.5 8 11.1 33.23 8.9 57 3640 16
LT295/70R18 129\126S E BLK 7.5 - 10 8.5 12 34.25 9.41 61 4080 17
LT285/65R18 125\122S E RWL 8 - 10 8.5 11.6 32.56 9.41 57 3640 16
LT305/65R18 124\121S E BLK 8.5 - 11 9 12.2 33.58 10 62 3525 16.5
LT325/65R18 127\124R E RWL 9 - 12 9.5 13 34.61 10.59 68 3860 16.5
LT325/60R18 124\121R E BLK 9 - 12 9.5 13 33.35 10.63 63 3525 16.5
35X12.50R18LT 123R E BLK 8.5 - 11 10 12.5 34.96 9.88 66 3415 16.5
LT275/65R20 126\123S E RWL 7.5 - 9.5 8 11.1 34.21 8.9 61 3750 16
LT285/65R20 127\124S E RWL 8 - 10 8.5 11.5 34.57 9.69 62 3860 16
LT265/60R20 121\118R E BLK 7.5 - 9.5 8 10.7 32.52 8.78 57 3195 16
LT275/60R20 123\120S E BLK 7.5 - 9.5 8 11 32.99 8.9 57 3415 16
LT285/60R20 125\122S E BLK 8 - 10 8.5 11.3 33.7 9.69 60 3640 16
LT295/60R20 126\123S E BLK 8 - 10 8.5 11.5 34.13 9.72 61 3750 16.5
LT325/60R20 126\123R E RWL 9 - 12 9.5 13 35.35 10.59 70 3750 16.5
LT275/55R20 120\117S E BLK 7.5 - 9.5 8.5 11.2 31.89 8.9 55 3085 16
LT285/55R20 122\119R E BLK 8 - 10 9 11.7 32.36 9.69 59 3305 16
LT305/55R20 121\118S E BLK 8.5 - 11 9.5 12.2 33.35 10.31 62 3195 16
35X12.50R20LT 121R E BLK 8.5 - 11 10 12.5 34.65 10 66 3195 16.5

Reviews

Rated 1 out of 5 by from Poor balance and out of round. I had dealership put tires on when truck is brand new. After 23,000 miles, tires show alot of wear. I've had tires balanced several times. Finally went to a tire shop that had a road Force balancer. One tire is out of round and another tire took 12 oz to balance. Worst set of Cooper's I have owned. Not sure what I'll do for my next set of tires.
Date published: 2019-12-29
Rated 5 out of 5 by from The Discoverer AT3 has every thing you may be looking for. I needed a good a around tire and my choice for years was Michelin’s LTX tire. I thought with all the Siping They would be really good in the snow but I was wrong. They were not good in the dirt or mud either. For years I went on like this until I was told to try a different product which was the Cooper Discoverer AT3. I will never go back to Michelin again. These tires do great in the mud and dirt. They do great in deep snow. I use my truck to get fire wood in the summer and I tow a big 14 thousand pound dump trailer in the woods and the tires pull the heavy load through the dirt very well. I started out using them on my 2002 Dodge diesel and then put them on my 2004 Jeep Grand Cherokee and now I am putting them on my 2017 Ram Power Wagon. I would say this tire is the best bang for the buck.
Date published: 2019-12-19
Rated 5 out of 5 by from Great value Bought these for my FJ80 Landcruiser and it looks boss! I love the white lettering. I have off road this thing in mud and dirt conditions and it is very competent. All I wonder is how they would fare in snow?? Any one from Cooper who could advise?
Date published: 2019-12-03
Rated 5 out of 5 by from As close to perfect as you can get. Installed on a 2017 Silverado 2500hd. 265/60r20 e rated. I am a contractor and coopers are on all my vehicles. Work vehicles and personal. The Goodyear’s that come on my truck was useless around job sites. These coopers will easier go in 2wd , the Goodyear’s was a struggle in 4wd. The tires are as quiet and smooth as a set of Michelin except they have superior traction. I will continue to buy coopers. plus they are reasonably price compared to other name brand tires.
Date published: 2019-11-23
Rated 5 out of 5 by from Cooper AT3 XLT Well made the switch last week to the coopers after being a Michelin guy. So far I’m in pressed. They ride good, I hope I can get 55k out of these new coopers. Had to do a lot of interfering. I will keep you advise after my second trip to outer banks this week.
Date published: 2019-11-17
Rated 5 out of 5 by from 2017 Ram 2500 w/6.7 -Mileage (excellent 60K+) -Comfort (excellent quiet/similar to factory tires) -Performance (snow = good, rain = excellent) **I am very pleased with this tire. I have been a BFG K/O guy until the Coopers have won me over** very great tire for a heavy truck. let's face it tires are very important part of the equation (passengers, stopping/starting, towing, etc). this tire is priced well and in my opinion the best investment for heavier trucks.
Date published: 2019-11-03
Rated 4 out of 5 by from Preferred original at3 Had original at3 before and the xlt are wider and have wider lug spacing. This killed my mileage. They're also louder because of this. Overall they're a good tire with great tread wear and traction on road in all conditions and good traction off-road. I won't be purchasing again due to mileage drop
Date published: 2019-11-02
Rated 5 out of 5 by from Love how they look Got my XLT tires about 6 months ago for my ram 2500. They are performing excellent so far with 18000 km on them. They are quiet and with the snow we just had I'm extremely happy to have them on my truck. And I can't say enough on how I love the side look. Made my truck look so much better. Thanks Cooper.
Date published: 2019-11-02
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Videos

Warranty

Standard Limited Warranty
Free 45-Day Test Drive
60,000 Mile Treadwear Protection - LT-Metric Sizes


Download the 2019 Consumer Replacement Tire Guide, Limited Warranty & Registration Booklet.

Reward

  • Wet stopping distance as compared to leading LT-denoted all-terrain tires reviewed on well-known consumer ratings sites. Individual on-road results may vary.