Discoverer AT3 XLT™

Fits Truck All-Season

Discoverer AT3 XLT™ is rated 4.5 out of 5 by 59.
  • y_2019, m_11, d_20, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.3-b1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_59
  • loc_en_US, sid_459_Trucks_Pickups, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_coopertire
  • bvseo_sdk, net_sdk,
  • CLOUD, getAggregateRating, 20ms

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*


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.

  • 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


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
Rated 5 out of 5 by from Excellent Tire to Date Purchased (4) Cooper Discoverer AT3 XLT LT275/70R18 tires that replaced 33"x12.5" Toyo MT Tires for a 2014 Ford F-150, FX4 Supercrew, 5.5' bed, 5.0L engine with 3.73 gears, and has a either a 2" or 4" lift, and modified exhaust so it's louder. Purchased these after making the decision to buy Falkken Wildpeak AT3 but were sold out at the time in October 2018. Cooper was my second choice. Also Considered BFG KO2's, Toyo's, & Nittos. Base price before labor/taxes was $226.99 and purchased a tire replacement certificates for all tires for $40 tires each. Tires have an aggressive look for an AT tire coming from the very aggressive MT tire. Made my truck look great! Black side wall against black truck color on bronze colored Fuel wheels. This tire purchase did not decrease this truck's aggressive look from switching to an AT tire. Road noise was definitely less compared to the previous Toyo MT's with little tread that I constantly heard all the time. I can hear the hum of the tires if I focus on it, but the engine, exhaust, wind noise, and radio drowns it out. This is quieter considering it's still an AT tire but not annoying loud. I am pleased with it's level of quietness (and remember E rating too). Traction is fantastic in dry, rain, or wet conditions. Have not driven on ice or heavy snow only minor dusting/slush (1" or less) but performed just fine. Have not used in mud or 4HI/Low but believe the tires will aid in traction. Oklahoma weather. Definitely can feel an increase in handling while turning compared to the MT tires and definitely has made me more comfortable in this truck's steering, braking, responsiveness, etc. In my opinion this is a heavy 1/2 ton and appreciate these tires aiding in my ability to stop. Truck driven as a daily driver but don't drive that often as I have a company vehicle. Tires have been on the vehicle for (1) year, no flats, vibrations, or abnormal air loss. Probably driven about 8000 miles and do not show any signs of wear on tread or sidewall from my driving use. Softer ride than previous tires, but my truck is lifted so it does not drive like a car. The ride is smoother but, remember it's still a truck. Overall the comfort is about a 3.5/5 compared to the previous 2/5 with the Toyo's. I believe with some Billstein shocks this will actually increase my ride comfort in combination with the Cooper tires. Have not towed with this truck only had minimal payload, but am confident these tires with the (E) rating add to my truck's ability to tow/haul loads should I need to in the future. Looking forward to using in heavy snow and future trips into Colorado with these tires. Look fantastic on my truck. Expensive tires in the size I chose but were reasonably priced for what I paid. Currently I would highly recommend specifically for F150 owners. Very happy with purchase and researched extensively these tire specs with my driving needs and wants before purchase. No regrets.
Date published: 2019-10-30
Rated 5 out of 5 by from The All Around Pickup Truck Tire! My F250 came with Continental’s, which weren’t up to the task. They were replaced with BFG All Terrains, which I liked and again with the newer BFG A/T KO2’s. Sadly, they didn’t last mileage wise, became hard and were noisy. While watching Garage Squad, a show sponsored by Cooper, I researched their tires for my 250. The Discover AT3XLT’s were, IMO, the best fit for an all around pickup truck tire. I’m really happy. My answers to the questions are based on performance to date. I’ve not had them long enough to post wear. I have no reason to believe they won’t deliver as promised.
Date published: 2019-10-26
Rated 1 out of 5 by from 2 blowouts after 24,000 miles I wish that I was on here writing a positive review of these tires, but I certainly didn't have a positive experience with them. They were on my 4wd 07 Tundra. In Cooper's defense, these tires were nearly 6 years old. However, I've parked my truck in my garage for the vast majority of the life of these tires. They only had 24k miles on them. On 9/28/19 my family and I were headed out of town in my truck. About 2/3 of the way to our destination I had a blowout of my right rear tire. After putting on my spare tire, I continued on my way and got within about 20 miles of my destination when my left rear tire blewout. Obviously I was stuck then and thankfully family was able to come get us while I left my truck on the side of the road. For reference, I rotated these tires about every 5-6k miles. They were properly inflated, and they didn't show any warning signs of pending failure. I had recently had my front-end aligned, and the tech didn't mention anything about the tires looking bad/dangerous to drive on. I don't frequently use my truck for hauling/towing. When I contacted Cooper after getting home from vacation, I was told that they had to have the tires to be able to do anything - with regard to a damage claim (to my truck) or any kind of warranty claim. Therefore, since I didn't haul back my 2 truck tires with me, my family, and all of our beach trip luggage, I hit a dead end with Cooper. If anyone reads this and has never experienced a blowout, in my experience it felt like driving down an extremely bumpy dirt road. The vibration was worse than I've ever felt. Also, if you do have an issue with premature failure of your tires (no matter the manufacturer), it might be wise to hold on to the old tires after getting them replaced so that you won't hit a dead end like I have. I would post a picture of 1 of the blownout tires if I could, but there is no place to do that.
Date published: 2019-10-09
Rated 5 out of 5 by from These tires are almost perfect. I have zero complaints with this tire. I have always been a fan of the ATPs, but I gave this one a try since the ATPs are only sold at certain stores and I got a smoking deal on these. I haven't been in snow yet, since I live the Phoenix area and all, but every other situation has provided excellent traction. My only complaint is, contrary to what Cooper advertises, is these things hold on to small rocks like crazy. I swear these tires are pebble magnets. It drives me nuts after I drive on a dirt road, then get onto pavement, and all I hear is the clack, clack, clack of pebbles stuck in the tread. Please Cooper, find a way to fix this.
Date published: 2019-10-05
Rated 5 out of 5 by from 10K miles on a 2017 Ram 1500 Longhorn I put the ATX3’s on after the right rear OEM tire had a fatal puncture. I’ve since put 10,000 miles on them and the performance has been great. The noise level at highway speeds is much less than I expected. Wet traction is much improved over the OEM tires. Tire pressures change about 5 psi from cold to operating temperature. I run 42 psi cold. On a hot day, operating psi will reach 46-47 psi. Wear so far is imperceptible and their 2nd rotation is coming up soon. Ride quality is great and I like having the 80 psi maximum rating so I can run higher towing pressure. You won’t regret getting the ATX3’s.
Date published: 2019-10-04
  • y_2019, m_11, d_20, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.3-b1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_59
  • loc_en_US, sid_459_Trucks_Pickups, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_coopertire
  • bvseo_sdk, net_sdk,
  • CLOUD, getReviews, 2ms



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.


  • 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.