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BFGoodrich KO2 vs Cooper AT3 4S, Plus the 2026 Rematch
August 13, 2026
BFGoodrich KO2 vs Cooper Discoverer AT3 4S: The Classic Matchup, and the 2026 Rematch
Updated April 2026 · Originally published Feb 2022The classic call still holds: the BFGoodrich KO2 for the off-road-leaning truck, the Cooper Discoverer AT3 4S for the daily commuter that trails occasionally, both 3PMSF snow-certified, with the Cooper carrying the longer warranty (65,000 vs 50,000 miles) and the friendlier price. The 2026 twist: both tires now have successors. The KO3 and Cooper's Road+Trail AT carry the same personalities forward with better wear numbers, so the winner of this matchup increasingly depends on which generation your size is in.
Tons of enthusiasts love going off-road but can't justify two sets of wheels and tires, which is exactly the buyer this matchup serves: two of the best all-terrains money can buy, aimed at two different crowds. Here's how they differ, what each offers, where each works best, and, new for this update, what their successors change about the answer.
Quick Links
BFGoodrich T/A KO2 Overview
The KO2 is an all-terrain that leans harder toward off-road use than daily driving, wrapped in styling that stays subtle next to flashier all-terrains. BFGoodrich invented the radial off-road tire and has dominated the market ever since, and when the KO2 launched, BFG called it their strongest all-terrain yet.
Tread Design
BFGoodrich fortified the sidewall and shoulder, where roughly 80% of all-terrain tire failures happen, beefing up the shoulder with their CoreGard technology and making the KO2 about 20% stronger there than the original KO it replaced. That reinforcement resists the punctures and chunking that end tires off-road or when road debris strikes.
The interlocking tread blocks handle multiple jobs at once: surface grip, handling, and crisp steering response. Tread voids clear water and debris, larger sipes flush water, mud, sand, and stones, and the raised shoulder areas eject mud while you're wheeling. It also wears the three-peak mountain snowflake, meaning it passed the severe-snow performance test; our snow rating guide explains what that badge takes. Road noise stays modest for the class, present, as any all-terrain's is, but never intrusive.
Cooper Discoverer AT3 4S Overview
The Cooper Discoverer AT3 4S was created to deliver on-road comfort with off-road durability: an all-terrain tread geared toward daily drivers and light-duty trucks and SUVs, subtle by design and less aggressive than the flashier corners of the category.
Tread Design
The AT3 4S runs a cleaner design of open blocks in a ribbed layout, optimizing wet and dry performance on asphalt. Micro sipes inside every tread block evacuate water and double as biting edges off-road, channels flush mud, stone, sand, and gravel on weekend excursions, and the outer blocks carry a sawtooth design that captures snow in the channel, using snow's own grip on snow for winter traction; like the KO2, it carries the 3PMSF certification. Stone ejector ledges handle the gravel-road housekeeping. The result rides quieter than nearly anything else in the class.
Which Tire Should You Buy?
Your truck earns its tread off the pavement
The aggressive pattern, CoreGard sidewalls, and legendary off-road résumé make the KO2 the pick for trucks that see real dirt. It handles commuter duty just fine, the price stays competitive, and the road noise is subtle enough that it never spoils the drive.
You commute daily and trail occasionally
Subtler tread, excellent wet and dry pavement manners, near-silent running, the longer warranty, and the friendlier price. For the truck that works Monday through Friday and adventures once a month, the Cooper is the honest value call.
| BFGoodrich KO2 | Cooper AT3 4S | |
|---|---|---|
| Personality | Off-road first | Commuter first |
| Snow | 3PMSF | 3PMSF |
| Warranty | 50,000 mi | 65,000 mi |
| Road Noise | Modest | Nearly none |
| Sidewall | CoreGard reinforced | Standard |
| Price Tier | Premium | Value-premium |
| Successor | KO3 | Road+Trail AT |
The 2026 Rematch: KO3 vs Road+Trail AT
Here's what's changed since this comparison first ran: both contenders now have successors, and the succession stories rhyme.
In the BFG corner, the T/A KO3 launched in 2024 and rolls out size by size through 2026: roughly 15% better treadwear and 20% better gravel-road durability than the KO2, improved snow traction, the same CoreGard toughness, and the same 50,000-mile warranty. KO2 sizes phase out as their KO3 twins arrive, which is why both still share the shelf.
In the Cooper corner, the Discoverer Road+Trail AT refreshes the AT3 4S formula with a more rugged sidewall design, superior wet performance, improved steering feel, and the same on-road comfort, now backed by a 65,000-mile warranty. And Cooper added a second punch: the Discoverer Stronghold AT (60,000-mile warranty), a beefier all-terrain built for towing, hauling, and heavier duty, covering the rugged flank the AT3 4S never claimed.
Still Can't Decide?
Our customer support team is enthusiasts like yourself; give them a call and they'll point you in the right direction for your exact truck and driving. And whichever corner you pick, the package route wins: wheels and tires mounted, balanced, and shipped free from our Wrightstown, Wisconsin warehouse, fitment-verified with the Perfect Drive 30-day fitment guarantee. Choosing a category before a model? Our truck tire decision guide starts one step earlier.
Frequently Asked Questions
Is it KO2 or K02?
KO2, with the letter O. The line descends from the 1999 T/A KO, so the letters spell the lineage: KO, KO2, KO3. The zero version is the internet's most persistent tire typo.
Is the Cooper AT3 4S discontinued?
It's transitioning: the Discoverer Road+Trail AT is its successor, and AT3 4S stock continues selling through at retailers in the meantime. Like the KO2-to-KO3 handoff, remaining sizes at good money stay a smart buy.
Which is better in snow, the KO2 or AT3 4S?
Both carry the 3PMSF severe-snow certification, which is rarer in this class than people assume. The Cooper's sawtooth snow-capture design gives it a slight packed-snow edge; the KO2 answers in deep, unplowed conditions. Snow-state drivers win either way.
Which lasts longer?
On paper, the Cooper: 65,000 miles warrantied versus the BFG's 50,000. The successors keep the gap, with the Road+Trail AT at 65,000 and the KO3 at 50,000 with roughly 15% better real-world wear than the KO2. Rotation discipline decides who collects; our rotation guide covers it.
Should I wait for the successors or buy the originals?
No waiting required; the successors are already shipping in most sizes. The rule from every handoff we cover: same money, buy the new generation; real discount on the original in your size, take the proven tire and drive happy.
Updated April 2026 with the KO3 and Road+Trail AT successor coverage. Size availability shifts through the transitions; product pages carry live stock.
