Finding the right set of 37×12.50R20 all-terrain tires is crucial for any serious off-road enthusiast. This specific size offers an aggressive stance and improved ground clearance, allowing you to tackle challenging landscapes with confidence. The right tire can mean the difference between conquering a rocky trail and getting stuck in the mud. With numerous options available, selecting the perfect balance of durability, traction, and on-road manners is key.
This roundup examines eight of the top contenders in this popular size. We have considered a range of tires, from hardcore mud-terrain designs to more balanced all-terrain options that perform well on the pavement too. Whether your priority is deep snow traction, quiet highway driving, or extreme rock crawling capabilities, there is a tire here built for your adventures. Our goal is to provide the information you need to make an informed decision for your vehicle.
Our Top Picks for 37×12.50R20 All-Terrain Tires
- Milestar Patagonia X/T All Terrain LT37X12.50R20
- BFGoodrich All Terrain T/A KO2 Radial Car Tire
- AMP 37×12.50R20 AMP Terrain Attack A/T Tire
- Toyo Tires OPEN COUNTRY M/T All-Terrain Radial Tire
- Mastercraft Courser MXT Mud-Terrain Tire
- BFGoodrich All-Terrain T/A KO2 37X12.50R20 121Q Tire
- Nitto Ridge Grappler 37X12.50R20 121Q Tire
- Toyo Open Country A/T III 37X12.50R20 121Q Tire
Milestar Patagonia X/T All Terrain LT37X12.50R20
The Milestar Patagonia X/T is designed for drivers who demand a high level of off-road performance without completely sacrificing on-road comfort. This tire features an aggressive tread pattern that is effective in a variety of conditions, from loose dirt to rocky paths. Its construction is built to resist cuts and chips, providing good durability for challenging trails.
With a focus on providing solid value, the Patagonia X/T aims to deliver capability that rivals more expensive brands. The tread design also helps with water evacuation to reduce hydroplaning on wet roads. It is a strong option for those who need a versatile tire that can handle weekend adventures and daily driving duties.
BFGoodrich All Terrain T/A KO2
The BFGoodrich All-Terrain T/A KO2 is a legendary name in the off-road world, known for its remarkable toughness and reliability. It is engineered with a robust sidewall armor that resists damage from sharp rocks and other trail hazards. This tire provides confident handling and control both on the highway and in demanding off-road situations like mud, sand, and rocks.
A key advantage of the KO2 is its year-round versatility, backed by a severe snow service rating. This means it performs exceptionally well in winter conditions, earning the Three-Peak Mountain Snowflake symbol. For drivers seeking a proven, do-it-all tire that combines comfort with extreme durability, the KO2 remains a top-tier choice.
AMP Terrain Attack A/T
The AMP Terrain Attack A/T is a durable, 10-ply rated all-terrain tire built for light trucks and SUVs. Its construction is designed to handle heavy loads and resist punctures, making it a practical option for both work and play. The tread pattern offers a balanced performance, providing traction off-road while maintaining a relatively quiet and stable ride on pavement.
This tire represents a solid value for drivers who need a tough, reliable tire for everyday use with occasional off-road excursions. The aggressive styling gives your vehicle a commanding look, while the functional design aims to deliver dependable performance across various surfaces and weather conditions.
Toyo Open Country M/T
The Toyo Open Country M/T is a premium mud-terrain tire that doesn’t hold back on extreme off-road capability. It features a deep, aggressive tread pattern with large tread blocks designed to dig into mud and clean out effectively. The tire’s construction includes a rugged triple-ply sidewall for maximum resistance against cuts and abrasions encountered in severe rock crawling.
Despite its mud-terrain focus, Toyo has worked to provide better on-road manners than typical M/T tires, including reduced road noise. For the off-road purist who faces the toughest conditions and requires ultimate traction, the Open Country M/T is a formidable option that projects a bold, aggressive stance.
Mastercraft Courser MXT
The Mastercraft Courser MXT is a dedicated mud-terrain tire built for drivers who frequently encounter deep mud and other challenging off-road surfaces. With a 10-ply load range E construction, it offers excellent durability and puncture resistance under heavy loads. The aggressive tread design and deep voids are made to provide maximum grip and self-cleaning action in sticky situations.
This tire features bold black lettering on the sidewall for a classic, rugged appearance. The Courser MXT is designed to deliver reliable performance for off-road enthusiasts who need a tire that can handle extreme conditions without compromise, making it a strong contender in the mud-terrain category.
BFGoodrich All-Terrain T/A KO2 121Q
This version of the iconic BFGoodrich KO2 offers the same proven performance and durability in a specific load rating for 37×12.50R20 applications. It is built with advanced technology to provide long tread life and exceptional off-road traction, thanks to its CoreGard technology and aggressive sidewall design. The tire is engineered to withstand the punishing conditions of rock crawling and high-speed off-road use.
Like its counterpart, this KO2 model is also severe snow rated, making it a truly all-season, all-terrain solution. It maintains a reputation for providing a comfortable and quiet ride on the street, which is a significant benefit for vehicles that see daily use. For those who trust the BFGoodrich name and need a specific load capacity, this tire is an excellent option.
Nitto Ridge Grappler
The Nitto Ridge Grappler is a innovative hybrid tire that blends the aggressive look and off-road traction of a mud-terrain tire with the quiet and comfortable ride of an all-terrain. Its variable pitch tread and noise-reduction philosophy help minimize road noise, a common complaint with more extreme tires. The robust construction and staggered shoulder lugs provide strong traction in dirt, mud, and rocky terrain.
This tire is perfect for the driver who wants an aggressive, high-performing off-road tire but still spends significant time on the highway. The Ridge Grappler’s ability to offer a smooth ride without sacrificing off-road capability has made it a very popular choice among truck and SUV owners.
Toyo Open Country A/T III
The Toyo Open Country A/T III is the next generation of all-terrain tires, featuring significant improvements in wet weather and winter performance. It uses a new tread compound and pattern designed to offer longer wear and better traction in snow, earning the Three-Peak Mountain Snowflake rating. The tire also boasts enhanced durability and puncture resistance for confident off-road travel.
This model focuses on providing a quiet and comfortable highway ride while maintaining the rugged capability needed for off-pavement adventures. With its updated technology and focus on all-season safety, the Open Country A/T III is a modern all-terrain tire well-suited for drivers who face a wide range of conditions throughout the year.
Buying Guide: How to Pick the Right 37×12.50R20 All-Terrain Tire
When I’m looking for a new set of 37-inch tires for my 20-inch wheels, I know it’s a significant investment. It’s not just about the aggressive look; it’s about finding a tire that can handle the specific type of off-road use I throw at it without making my daily drive miserable. The key is balancing capability with on-road manners. Here’s what I always consider before making a purchase.
First, I think about the terrain I most frequently encounter. If my off-roading is mostly on rocky trails, I prioritize a tire with strong, durable sidewalls and deep, multi-pitch tread blocks that can grip uneven surfaces. For mud, I need an all-terrain that isn’t afraid to get a little messy, with wider, more open grooves to self-clean. If I spend more time on gravel roads and hard-packed dirt, a tire with a tighter tread pattern and stone ejectors will offer better stability and longevity.
Treadwear and road noise are huge factors for me because my truck is also my daily driver. An extremely aggressive tire might be fantastic on the trail, but the constant hum on the highway can get old fast. I look for tires that use variable pitch tread designs, as these are engineered to cancel out noise, making for a much quieter ride. I also check the treadwear rating; a higher number generally means a longer-lasting tire, though it often comes with a slightly harder compound that might sacrifice a bit of grip in cold or wet conditions.
Load range is critical with a tire this size. I make sure to match the load range (like C, D, or E) to my vehicle’s weight and how I use it. If I’m carrying heavy gear or towing, a Load Range E tire provides the necessary stiffness and weight capacity. However, a softer Load Range C tire can offer a smoother ride and better conformability on rocks if my rig is lighter.
Finally, I never skip researching real-world user experiences. Professional reviews are great, but I spend time on forums and product pages to see what other people with similar trucks are saying about wear, punctures, and performance in specific conditions. This hands-on feedback is often the most honest and helps me narrow down my final choice for the best all terrain tires in 37×12.50R20 size for off-road use.
Frequently Asked Questions
Will 37×12.50R20 tires fit on my stock truck?
In almost all cases, no. A 37-inch tire is significantly larger than what comes on a stock truck from the factory. Trying to fit them without modifications will almost certainly result in severe rubbing against the wheel wells, suspension, and frame when turning or going over bumps. To properly run this size, you will likely need a suspension lift kit, a leveling kit, or at the very least, some serious fender trimming. It’s best to consult with a specialist who can assess your specific vehicle.
How does moving to a 37-inch tire affect my truck’s performance?
You’ll feel a few key changes. The most noticeable is a loss of acceleration and a change in your effective gear ratio. Your engine has to work harder to turn these larger, heavier tires, which can make the truck feel sluggish. Your speedometer will also be incorrect until it’s recalibrated. On the positive side, you gain significant ground clearance, which is great for off-roading. The ride quality on rough roads can also improve due to the taller sidewall absorbing more impacts.
Are all-terrain tires good in snow and ice?
Modern all-terrain tires are much better in winter conditions than they used to be, especially if they carry the Three-Peak Mountain Snowflake (3PMSF) symbol. This means they are certified for severe snow service. However, it’s important to remember they are not a dedicated winter tire. They will perform well in light to moderate snow and slush, but on sheer ice, a tire with specialized rubber compounds and biting edges will always be superior. For occasional winter driving, a good 3PMSF-rated all-terrain is a solid compromise.
What is the typical lifespan of a 37×12.50R20 all-terrain tire?
This varies a lot based on the specific tire model, your driving habits, and how well you maintain them. A high-quality all-terrain tire, with regular rotations and proper air pressure, might last anywhere from 40,000 to 60,000 miles. If you do a lot of hard off-roading or your alignment is off, you can expect that lifespan to decrease considerably. Aggressive driving on pavement will also wear them out much faster.
Do I need to get my wheels rebalanced often with larger tires?
Larger, heavier tires are more prone to losing balance, especially after a tough off-road session where you might pick up mud in the wheels or slightly bend a rim. I find it’s a good practice to have them rebalanced whenever you rotate your tires, which should be every 5,000 to 7,500 miles. If you start to feel a vibration at highway speeds, that’s your first sign that a rebalance is needed.
Can I run these tires at a lower air pressure when off-roading?
Yes, and you absolutely should for better traction. Airing down increases the tire’s contact patch, allowing it to conform to the terrain and grip better. For sand or sharp rocks, I might air down to as low as 15-18 PSI. For general trail riding, 20-25 PSI is often a good starting point. The crucial thing to remember is that you must re-inflate them to the proper highway pressure (check your door jamb) before driving at speed on pavement to avoid overheating and damaging the tire. A good onboard air system is a worthwhile investment.