Stepping up to a 37 inch all terrain tire is one of the biggest upgrades you can make to a lifted truck or Jeep, but it is also one of the easiest to get wrong. A 37 needs the right balance of sidewall strength for the trail, a tread pattern that clears mud and rock without screaming on the highway, and enough load rating to carry a heavy rig loaded for a weekend. We ran a wide field of true 37×12.50 and 37×13.50 options across dirt, gravel, wet pavement, and long freeway miles to see which ones actually deliver.
Below are our seven favorite 37 all terrain tires, ranked best first. Each one is a real, widely available size that fits common 17, 18, and 20 inch wheel setups. We focused on honest, real world behavior: how they hook up off road, how they ride on the street, how long the tread lasts, and where each one falls short. No hype, just what these tires are genuinely good at.
| Photo | Product | Score | Buy |
|---|---|---|---|
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BFGoodrich All-Terrain T/A KO2 37×12.50R17 Best Overall 37×12.50R17, Load Range E, 3-ply sidewall, severe snow rated |
9.5 | 🛒 Check Price |
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Nitto Ridge Grappler 37×12.50R17 Best Hybrid Tread 37×12.50R17, hybrid AT/MT tread, Load Range E, reinforced shoulders |
9.3 | 🛒 Check Price |
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Toyo Open Country A/T III 37×12.50R17 Best On-Road Comfort 37×12.50R17, Load Range E, 3-peak snow rated, 65k mile warranty |
9.2 | 🛒 Check Price |
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Falken Wildpeak A/T3W 37×12.50R17 Best Value 37×12.50R17, Load Range E, 3-peak snow rated, rugged sidewall |
9.1 | 🛒 Check Price |
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Cooper Discoverer STT Pro 37×12.50R17 Best Off-Road Traction 37×12.50R17, Load Range E, armor tek3 casing, mud and snow rated |
8.9 | 🛒 Check Price |
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Goodyear Wrangler DuraTrac 37×12.50R17 Best in Mud and Snow 37×12.50R17, Load Range E, 3-peak snow rated, stud-ready tread |
8.7 | 🛒 Check Price |
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Mickey Thompson Baja Boss A/T 37×12.50R17 Best Aggressive Look 37×12.50R17, Load Range E, hybrid AT/MT tread, 3-peak snow rated |
8.5 | 🛒 Check Price |
1. BFGoodrich All-Terrain T/A KO2 37×12.50R17: Best Overall
The KO2 has earned its reputation as the default 37 inch all terrain for a reason. The CoreGard sidewall is the standout feature, wrapping thicker, cut resistant rubber down the lower sidewall where rocks and trail debris do the most damage. On the trail we found it shrugged off sharp edges that would gouge a softer tire, and the staggered shoulder blocks reach into ruts to claw out of loose terrain. It is also one of the few aggressive 37s with a genuine severe snow rating, so it pulls its weight in winter conditions instead of becoming a liability.
The honest weakness is mud. The KO2 is a true all terrain, not a mud terrain, and once you hit deep, gummy clay the tighter tread spacing packs and loses bite. It is also clearly louder than a softer touring AT at freeway speeds, which you will hear on a long road trip. But for a tire that has to do everything, daily drive, tow, wheel hard, and survive, the KO2 remains the most complete and trustworthy 37 you can bolt on.
- CoreGard sidewall rubber resists cuts, bruises, and splits on rock
- Interlocking tread blocks balance off road bite with even highway wear
- 3-peak mountain snowflake rating for real winter traction
Pros: Proven durability that holds up to years of hard trail use; Excellent grip in dirt, gravel, rock, and light mud; Long, even tread life for an aggressive all terrain
Cons: Noticeably noisier on the highway than a mild touring AT; Not the strongest performer in deep, sticky mud
2. Nitto Ridge Grappler 37×12.50R17: Best Hybrid Tread
The Ridge Grappler is Nitto’s hybrid answer for buyers who want mud terrain looks and bite without full mud terrain noise. The tread runs a tighter, all terrain style center for stable highway manners while the outer shoulders open up into aggressive, mud terrain style blocks that hook into ruts and rocks. In practice this works: on the trail the 37 inch Ridge Grappler digs harder than a pure AT, and the side biters along the sidewall genuinely help when you air down and lean a block into a rut wall.
The compromise shows up in two places. The tire is heavy, and on a half ton you feel that mass during acceleration and braking. Wet pavement is the other soft spot, where the chunkier shoulder voids give up some grip compared to a more road focused all terrain. If you spend most of your time on dirt and want a tire that looks and bites like a mud terrain while staying civil on the freeway, though, the Ridge Grappler is one of the best balanced 37s available.
- Hybrid pattern blends all terrain center with mud terrain shoulders
- Variable pitch tread design lowers highway noise
- Stone ejectors and side biters add off road traction
Pros: Quieter on road than its aggressive looks suggest; Strong off road bite from the mud terrain style shoulders; Sharp, modern appearance that fills a wheel well well
Cons: Heavier than some rivals, which can dull throttle response; Wet pavement grip trails the dedicated all terrains
3. Toyo Open Country A/T III 37×12.50R17: Best On-Road Comfort
If your 37 inch build spends more time on pavement than rocks, the Open Country A/T III is the one to beat for daily comfort. Toyo tuned this generation specifically to cut noise, and it shows. On the highway it is among the quietest aggressive 37s we evaluated, with a settled, planted ride that does not punish you on long commutes. It carries a 3-peak snow rating and a treadwear warranty that is rare in this size, so you get all season confidence plus real mileage out of the deal.
The trade off is off road ferocity. The A/T III is a capable, well rounded tire on dirt and gravel, but its tighter, road biased tread does not claw or self clean like the more open hybrid designs when conditions get deep and muddy. Wheelers who chase hard trails will want something chunkier. For the overlander, daily driver, or tow rig that occasionally goes exploring, this is the most refined and easy to own 37 on the list.
- Refined tread pattern keeps highway noise low for an aggressive AT
- 3-peak mountain snowflake rating for winter capability
- Backed by a generous treadwear mileage warranty
Pros: Smooth, quiet ride that is easy to live with daily; Long tread life backed by a mileage warranty; Reliable all season and light winter traction
Cons: Less aggressive bite than mud-leaning hybrids off road; Shoulder lugs clear mud slower than open tread designs
4. Falken Wildpeak A/T3W 37×12.50R17: Best Value
The Wildpeak A/T3W has become a go to for builders who want most of the KO2’s capability without paying the premium. In the 37 inch size it punches above its weight: the rugged, stepped sidewall blocks give it real grip when you air down and crawl over rock, and Falken’s heat diffuser tech in the lower sidewall helps the tire shed heat when it is loaded down and working hard on the highway. It is also 3-peak snow rated and genuinely good in the wet, which is where a lot of all terrains fall apart.
The ride is the honest knock. The A/T3W runs a stiff, tough casing, and on rough or broken pavement it can transmit more of the road than a softer touring tire. It is not harsh, but it is firmer. That same stiffness is exactly what makes it durable off road, so it is a fair tradeoff. For a 37 that delivers serious all weather and trail capability without the top shelf badge, the Wildpeak is the smart buy.
- Heat diffuser technology helps the tire run cooler under heavy loads
- 3-peak mountain snowflake certified for severe snow
- Rigid, stepped sidewall blocks add off road and rock grip
Pros: Strong all around capability for the value; Excellent wet and snow traction for an all terrain; Tough sidewall handles rocks and trail abuse well
Cons: Tread can feel slightly firmer on broken pavement; Not as plush riding as a dedicated touring tire
5. Cooper Discoverer STT Pro 37×12.50R17: Best Off-Road Traction
The Discoverer STT Pro leans the furthest toward serious off road duty on this list, and if your 37 inch build exists to wheel hard, it is the traction champion here. The open, aggressive tread with mud release dimples and stone ejectors keeps the tire clearing and biting in conditions that choke a tighter all terrain. Underneath, Cooper’s Armor Tek3 three-ply casing is genuinely tough, resisting the punctures and sidewall bruising that end trail days. Air it down and it conforms and claws over rock impressively for a tire in this class.
You pay for that capability on the street. This is the loudest tire in our test, with a constant tread hum that grows with speed, and the aggressive, softer compound does not last as long as a KO2 or A/T III in highway miles. It is a tire that knows what it is for. If you want maximum dig and durability off road and can accept noise and shorter tread life as the price, the STT Pro earns its spot.
- Armor Tek3 three-ply carcass resists punctures and bruising
- Mud release dimples and stone ejectors keep tread clearing
- Aggressive open tread bites in mud, sand, and loose dirt
Pros: Outstanding traction in mud, sand, and deep loose terrain; Burly three-ply construction built for abuse; Self cleaning tread that stays effective in muck
Cons: Loud on the highway, with clear tread hum at speed; Tread wears faster than the milder all terrains
6. Goodyear Wrangler DuraTrac 37×12.50R17: Best in Mud and Snow
The Wrangler DuraTrac sits right between an all terrain and a mud terrain, and in the 37 inch size it shines when conditions turn nasty. Goodyear’s TractiveGroove tread reaches deep into mud and snow and pulls when other tires spin, and the self cleaning shoulder blocks throw packed muck out fast so the tread stays effective. It is 3-peak snow rated and, uniquely on this list, stud ready, so drivers in serious ice country can add studs for real winter bite. For a working truck that plows through slop and snow, it is hard to beat.
The DuraTrac’s weakness is the same one shared by aggressive winter focused treads: noise and wear. It starts reasonably quiet but gets louder as it wears down, and it will not match a road biased all terrain for total highway mileage. That is the cost of the open, biting tread. If your priority is conquering mud and snow and you are willing to trade some long term quiet and tread life, the DuraTrac is a genuinely capable 37.
- TractiveGroove technology bites in deep mud and snow
- Self cleaning shoulder blocks shed packed muck quickly
- Stud ready design for added winter ice traction
Pros: Excellent deep mud and snow performance; Optional studs boost ice traction in harsh winters; Strong self cleaning tread for loose conditions
Cons: Road noise rises noticeably as the tire wears; Highway tread life is shorter than mild all terrains
7. Mickey Thompson Baja Boss A/T 37×12.50R17: Best Aggressive Look
The Baja Boss A/T is Mickey Thompson’s hybrid play, and it is the tire to pick if you want your 37 inch build to look as serious as it performs. The asymmetric tread mixes a tighter all terrain section for highway stability with bold, mud terrain style lugs that grab in dirt, rock, and snow. The PowerPly XD three-ply sidewall is genuinely stout, giving you real confidence to lean the tire into rock when aired down. It is 3-peak snow rated too, so it backs up the aggressive looks with all season capability.
The honest downside is mass. This is a heavy tire, and on anything short of a torquey diesel you feel it in acceleration, braking, and fuel economy. It also carries more road noise than the mild all terrains, though it stays quieter than a full mud terrain. If you want maximum visual aggression with hybrid trail capability and you can live with the weight penalty, the Baja Boss A/T delivers a striking, capable 37.
- Asymmetric hybrid tread blends mud terrain bite with AT manners
- PowerPly XD three-ply sidewall resists punctures and tears
- 3-peak mountain snowflake rated for severe snow traction
Pros: Bold, aggressive looks that stand out on a build; Tough three-ply sidewall built for trail abuse; Capable hybrid traction in mud, dirt, and snow
Cons: Heavy tire that can sap acceleration and fuel economy; More road noise than a pure all terrain at speed
Frequently Asked Questions
What size wheel do I need for 37 inch all terrain tires?
Most 37 inch all terrain tires come in popular fitments like 37×12.50R17, 37×12.50R18, and 37×13.50R20, so they bolt onto common 17, 18, and 20 inch wheels. Seventeen inch wheels are the most popular choice for 37s because they leave more sidewall, which means a more comfortable ride, better off road compliance when you air down, and more rubber protecting the wheel from rock damage. Make sure your wheels have the correct width and backspacing for the tire so the tread sits properly and clears your suspension and fenders at full steering lock.
Will 37 inch tires fit my truck without a lift?
In almost every case, no. A 37 inch tire is large enough that it will rub the fenders, inner wells, and suspension components without a suspension lift, usually in the range of three to six inches depending on the vehicle, plus correct wheel backspacing. Many builds also need fender trimming, a body mount chop, or relocated components to clear at full lock and on flex. Always confirm the specific lift height, wheel offset, and trimming your platform needs before buying 37s, because fitment varies widely between trucks and Jeeps.
Do 37 inch all terrain tires hurt gas mileage?
Yes, expect a noticeable drop. A 37 is taller and much heavier than a stock tire, and that added rotating mass plus the change in effective gearing forces the engine to work harder, which lowers fuel economy. The aggressive tread and larger contact patch add rolling resistance on top of that. You can recover some of the loss by re-gearing your differentials to match the larger diameter and by recalibrating your speedometer, but you should still plan on reduced mileage as part of the cost of running 37s.
What load range should I choose for 37 inch tires?
For most trucks and Jeeps running 37s, Load Range E is the standard and safest choice. Load Range E tires use a heavier construction and higher maximum pressure rating to support the weight of a full size truck, especially when towing or hauling. If you have a lighter vehicle like a Jeep Wrangler that does not carry heavy loads, some drivers prefer a Load Range C in this size for a softer ride and better off road compliance when aired down. Match the load range to your vehicle weight and how you use it.
How long do 37 inch all terrain tires last?
Tread life depends heavily on the tire and how you drive. A road biased all terrain like the Toyo Open Country A/T III or BFGoodrich KO2 can deliver long mileage and some even carry treadwear warranties, while aggressive hybrid and mud leaning tires like the Cooper STT Pro or Goodyear DuraTrac wear faster because of their softer compounds and open tread. Regular rotations, correct inflation, proper alignment, and avoiding constant hard acceleration all extend the life of a 37. Heavy off road use and aggressive driving will shorten it considerably.
Our Verdict
For most drivers, the BFGoodrich All-Terrain T/A KO2 is our top pick among 37 inch all terrain tires, thanks to its tough CoreGard sidewall, balanced trail and highway performance, severe snow rating, and proven long term durability. If you want a more aggressive hybrid that bites harder off road while staying civil on the freeway, the Nitto Ridge Grappler is our runner up and a fantastic choice for builds that live in the dirt. Whichever you pick, match the load range and wheel size to your rig and confirm your lift and clearance before you buy.
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