Discoverer AT3 XLT™

Fits Trucks/Pickups All-Season

Discoverer AT3 XLT™ is rated 4.7 out of 5 by 37.
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Standard Limited Warranty
Free 45-Day Road Test
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
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 5 out of 5 by from Best truck tire on the market. Fire Department tough! Best truck tire yet in the Cooper lineup. I have had ATP and AT3, which are outstanding, but Cooper went to the moon with the XLT.
Date published: 2019-05-11
Rated 4 out of 5 by from After lots of research Currently I drive a 2012 Ram 3500 single rear wheel Crew Cab 4x4 Diesel. After countless hours of research and numerous contacts with Cooper Tires I had it down to the Falken AT3W and CoooerAT3 XLT. I finally pulled the trigger and went with the Cooper's. I had good experiences with their STT tires on my old 1500. They offered a great mileage warranty on the XLT tires. I do Search and Rescue with my truck in the Mojave Desert of Southern California. So I need s reliable tire both on and off the road. I believe these tires will deliver. So far they have awesome on road and highway manners. We have had recent rain so I got to test them out in the desert in both wet and dry conditions. All I need now is time to tow my travel trailer and see how well the tread holds up. The mist I've gotten from any tire was 42000 miles. This Ram weighs 8500# so I not time will tell how they hold up. I have high expectations and will update in about 20000 miles
Date published: 2019-05-11
Rated 4 out of 5 by from Love these tires Awesome look love the solid white lettering and no noise tire. Great wear so far. I have a request .... would Love to see these tires other than 10 ply little to heavy ...6 ply would be perfect for my truck I would then have best of both worlds looks and gas mileage
Date published: 2019-05-07
Rated 5 out of 5 by from Nice quite ride Took off STT PRO plow tires & bought 35x12.50R18AT3 XLTs . Love the tough sidewall "offroad look" but summer tread. After finding the right pressures to run on my 2018 3500 single wheel Duramax I am never going back to Mickey's ! ( after about 20 sets ). My trucks allways attract a lot of looks , point in case, some tires don't work out so good on some trucks for some reason,both my sets of Coopers have not been balanced, no shakes, don't fix something that is not broke. THANKS.
Date published: 2019-04-27
Rated 5 out of 5 by from Best all terrain tires iv'e ever owned I put these on my 95 Silverado and have been in the mud, snow and gravel with no issues of traction at all. Not to mention they are smooth and quiet on the pavement as well. Great tires!
Date published: 2019-04-19
Rated 3 out of 5 by from Not bad but not great Wears quick, uneven tread at 25000. This is my second set of the AT3.
Date published: 2019-04-02
Rated 5 out of 5 by from Really a kick$$$ tire!! 275/70/R18 on F150 supercrew: Seriously beefy looking tires. Pictures don't do them justice, especially treadwalls and tread depth. The XLT is a game changer in my book and I almost passed on buying them. I bought these last November (now 5 months of use). They performed amazing throughout the late fall and winter. Snow, slush, ice, you name it, they handled it better than any tire i've ever seen. I even towed an 8k load over snowy/icy roads 400+ miles no problem, and that even though I had the trailer weight distribution less than ideal. It seems there is always someone complaining about ice handling no matter the tire, but most likely they just don't know how to drive and blame their lack of driving skills on the tire!! Then go vent frustrations for their insurance claim on a tire review. For deep snow (15"+) these tires also handle fantastic. For deep snow you don't want a mud tire that digs, you want something like this. LT275/70/R18 on my F150 with diff lockers and it feels like it will go anywhere. Road noise is minimal. There is a bit of a hum and steering wheel vibration below 40mph (maybe it's alignment, but I had that done), but above 40mph nothing to notice at all up to 90mph (I haven't drove faster). The vibe and noise is really minimal, just know that it's going to be more than stock highway tread! Wet road traction has also been great. My stock wrangers broke free a few times, these not so at all. Treadlife over 10k miles is unnoticeable from new. I'm pretty sure these tires will last longer than I own the truck for and I'll buy my next set of XLTs on a new truck. Also note that MPG on a tire like this will take a hit. For me it was the combination of tire size and weight. I probably lost 1-2mpg going up one size and adding the LT rated tire, which is much heavier rotating mass.
Date published: 2019-03-28
Rated 5 out of 5 by from Cooper Tires are the best!!!!! I own a tire shop. When the owner has Cooper tires on everything he owns, pay attention. There is a reason for that.. Best tires on the planet!!!!
Date published: 2019-03-24
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Videos

Warranty

Standard Limited Warranty
Free 45-Day Road Test
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.