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Upgrading to 37 inch tires changes how your Ford F-150 handles off-road terrain, towing loads, and everyday driving. The right 37 inch tires balance traction, load capacity, and long-term durability while minimizing impact on fuel economy and steering feel. This guide shortlists the top options in the 37 inch category for the F-150, focusing on tires that suit heavy-duty use, mixed on/off-road conditions, and highway stability. We evaluated candidates across tread design, load rating, ride comfort, and treadwear expectations to present the most suitable 37 inch tires for typical F-150 owners. Read on for the selection rationale and the practical factors that will help you pick the best fit for your needs.
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Top Picks at a Glance
| Best Overall The best all-around choice for most situations | BFGoodrich Mud-Terrain T/A KM3 37×13.50R20 Mud-Terrain Tire |  |
| Best Quality Built to a higher standard if you want something more solid | Cooper Discoverer STT Pro 37×13.50R18 LT Tire |  |
| Best Value The sweet spot between price and what you get | Miletrip TP99 R/T 37×13.50R20 All-Terrain Light Truck Tire |  |
| Best Budget The cheapest option that still gets the job done reliably | Barkley Rammus X/T 37×13.50R20 All-Terrain Mud Light Truck Tire |  |
| Highest Rated A top-rated pick with lots of positive feedback | BFGoodrich All-Terrain T/A KO2 37×13.50R18 LT Tire |  |
| Most Popular A crowd favorite that many people choose with confidence | Cooper Discoverer STT Pro 37×13.50R20LT All-Season Off-Road Tire | |
BFGoodrich Mud-Terrain T/A KM3 37×13.50R20 Mud-Terrain Tire
| Size | 37×13.50R20/E 127Q |
|---|---|
| Load Capacity | 3860 Pounds |
| Load Range | E |
| Construction Type | Radial |
| Tread Depth | 18 32nds |
The BFGoodrich Mud-Terrain T/A KM3 is a purpose-built 37×13.50R20 mud-terrain tire aimed at serious off-road use while remaining usable on the road. It uses a Terrain-Attack tread pattern with large tread blocks and Mud-Phobic bars to eject mud and maintain bite in soft, sloppy conditions, and Krawl-TEK technology for improved rock climbing traction. The tire’s thicker, race-proven sidewall construction increases resistance to splits and punctures on rough trails. In everyday use it rides quieter and more composed than older aggressive mud tires, and the symmetrical tread helps with handling on wet and mixed surfaces. Expect stronger traction off-road and tougher sidewalls at the expense of heavier weight and somewhat reduced fuel economy compared with highway tires. This tire is best when you need genuine mud and rock capability plus durability for lifted trucks running 37-inch rubber, but if you spend almost all miles on pavement a less aggressive all-terrain will be more comfortable and efficient.
Best for: Buyers who want a 37-inch mud-capable tire that prioritizes off-road grip and sidewall durability but still performs acceptably on pavement for daily driving.
Less Ideal for: Drivers who cover mostly highway miles, need the quietest possible ride, or prioritize maximum fuel economy should consider less aggressive all-terrain or highway tires instead.
- Very strong off-road traction in mud and on rocks due to Terrain-Attack tread and Krawl-TEK technology
- Reinforced, thicker sidewalls improve puncture and split resistance on rough trails
- Notably quieter and more composed on-road than many previous aggressive mud-terrain designs
- Heavier construction increases rolling resistance and can reduce fuel economy compared with highway or all-terrain tires
Verdict: Choose the KM3 if you want a 37-inch tire that delivers serious mud and rock capability with reinforced sidewalls for durable off-road use.
Cooper Discoverer STT Pro 37×13.50R18 LT Tire
| Rim Size | 18 Inches |
|---|---|
| Load Index | 124.0 |
| Speed Rating | Q |
| Load Capacity | 3525 Pounds |
| Load Range | D |
The Cooper Discoverer STT Pro is a heavy-duty 37-inch LT tire engineered for extreme off-road use while remaining usable on pavement. Its deep, aggressive tread, stone-expelling channels, and Rock Climber sidewall cleats provide strong grip in mud, rocks, sand, and steep trail sections, and the Armor Tek3 construction improves resistance to sidewall cuts and stone damage. On-road the tire performs respectably for an aggressive mud-terrain style design: drivers report good wet traction and a ride that is balanced though louder than touring tires. Its 8-ply load range D construction and 124 load index make it suitable for heavy trucks and towing. Expect increased road noise, higher rolling resistance, and more stone kick-up compared with highway tires, plus somewhat slower break-in wear characteristics. For drivers who prioritize trail capability and puncture resistance, this tire delivers; for those seeking quiet highway cruising or maximum fuel efficiency, a less aggressive all-terrain or highway tire will be a better match.
Best for: Drivers who put extreme off-road performance and sidewall durability at the top of their priorities and plan to use their truck for heavy-duty trail work, rock crawling, or frequent off-pavement excursions.
Less Ideal for: Commuters and long-distance highway drivers who prioritize low noise, fuel economy, and the quietest possible ride should consider less aggressive all-terrain or highway-focused tires instead.
- Very aggressive tread and deep lugs for excellent off-road traction in mud, rock, and sand.
- Armor Tek3 sidewall construction and stone armor reduce cuts and punctures on rough terrain.
- 8-ply, Load Range D with 124 load index supports heavy-duty use, towing, and hauling.
- Tread features designed to expel stones and resist stone retention, helping prevent damage.
- Users report good wet traction and durable treadwear for an aggressive off-road tire.
- Noticeably louder and less fuel efficient on highway compared with highway/all-terrain tires.
- Can kick up stones and debris that may chip nearby body paint without added protection.
Verdict: Choose the STT Pro if you need a 37-inch tire that prioritizes aggressive off-road traction and reinforced sidewall durability for heavy-duty trail use.
Miletrip TP99 R/T 37×13.50R20 All-Terrain Light Truck Tire
| Size | LT37X13.50R20 |
|---|---|
| Load Index | 128 |
| Load Capacity | 3968 Pounds |
| Load Range | F |
| Ply | 12-Ply |
The Miletrip TP99 R/T is a rugged-terrain 37×13.50R20 tire built for light trucks and year-round driving. Its aggressive, staggered block pattern and high void ratio help clear mud and stones while giving added bite on loose surfaces, and the non-directional tread aims to balance off-road grip with quieter on-road manners. The 12-ply, load range F carcass and reinforced internal structure are geared toward heavier loads and towing, and the manufacturer lists a high 80 psi maximum inflation for carrying capacity. Drivers will notice a composed steering feel and reduced vibration compared with older, louder mud tires, and many owners report good highway comfort and low noise. Expect solid mud and snow traction for occasional off-road use, but do not expect the lifespan or measured performance of premium, name-brand all-terrain tires; treadlife numbers are not provided and actual longevity will vary with load and driving style. Fitment, mounting, and balancing are standard for LT37 sizes but consider professional installation because of the tire size and weight.
Best for: Buyers seeking a budget-conscious 37-inch tire that handles mixed road and trail use while carrying heavier loads and improving highway comfort.
Less Ideal for: Drivers who prioritize measured longevity, premium brand tire warranties, or aggressive rock-crawling performance should consider higher-end or specialized alternatives.
- Aggressive tread with high void ratio for self-cleaning in mud and loose terrain
- 12-ply load range F construction for higher load capacity and towing
- Reportedly quiet and comfortable on highway compared with typical mud tires
- Non-directional tread balances off-road traction with predictable on-road handling
- Manufacturer does not list a treadwear rating or expected mileage, making longevity uncertain
Verdict: Choose the Miletrip TP99 R/T when you want a durable, load-capable 37-inch all-terrain tire that improves highway comfort without spending for premium name-brand options.
Barkley Rammus X/T 37×13.50R20 All-Terrain Mud Light Truck Tire
| Size | 37X13.50R20 |
|---|---|
| Load Index | 128 |
| Load Capacity | 3968 Pounds |
| Load Range | F |
| Construction Type | Radial |
The Barkley Rammus X/T is a budget-oriented 37×13.50R20 all-terrain tire built for light trucks that need aggressive traction and high load capacity without a premium price. It uses a radial construction and a 12-ply load range F rating to support heavy loads and towing, while the aggressive tread pattern is aimed at mud and mixed off-road conditions. Typical use is for trucks that see a mix of highway driving and off-road trails where durability and bite matter more than a quiet ride. Notable features include a high 128 load index, Q speed rating for safe highway speeds, and a 20-inch rim fitment common on lifted F-150 builds. Practical benefits are strong load handling and tougher sidewalls for rough terrain. Limitations are that ride comfort and road noise will likely lag behind premium all-terrain tires and wet braking or fuel economy may be compromised compared with more highway-focused options. This tire is a functional choice if you prioritize load capacity and off-road traction on a budget.
Best for: Buyers who need a low-cost 37-inch tire that prioritizes load carrying and off-road traction for occasional trail use and heavy hauling.
Less Ideal for: Drivers who want a quiet, highway-focused tire, the longest rolling efficiency, or the best wet-braking performance should consider higher-end all-terrain or highway tires instead.
- High load capacity with 128 load index and 3968 lb rating suitable for heavy loads and towing
- 12-ply load range F construction for tougher sidewall protection on rough terrain
- Aggressive all-terrain/mud tread designed for off-road traction
- Common 20-inch rim fitment that works with lifted 37-inch setups
- Likely higher road noise and firmer ride compared with premium highway all-terrain tires
- Speed rating Q limits higher-speed performance compared with higher-rated tires
Verdict: A practical budget 37-inch tire that delivers heavy-load capacity and aggressive off-road traction for F-150 builds without a premium price.
BFGoodrich All-Terrain T/A KO2 37×13.50R18 LT Tire
| Rim Size | 18 Inches |
|---|---|
| Load Index | 128 |
| Speed Rating | R |
| Load Capacity | 3970 Pounds |
| Load Range | E |
The BFGoodrich All-Terrain T/A KO2 in 37×13.50R18 is built to give Ford F-150 owners a durable, year-round all-terrain option that balances on-road comfort with off-road capability. Designed with tougher sidewalls and an interlocking tread pattern, this tire resists cuts and chipping on rough trails while maintaining even wear for longer tread life. It performs well in mud, gravel, and severe snow conditions thanks to aggressive tread blocks and a severe snow rating. For daily driving on pavement the KO2 is reasonably quiet for its class and feels stable through corners because of its reinforced construction, though the heavier LT/E-load-range construction will slightly reduce acceleration and fuel economy compared with lighter street tires. Installation on a properly lifted or leveled F-150 is straightforward, but you should check clearances and gearing for a 37-inch diameter tire. Overall it is a dependable choice when toughness and long wear are priorities for a truck that sees a mix of highway and rough-road use.
Best for: F-150 drivers who prioritize long-term dependability and rugged all-terrain performance for mixed on-road and off-road use and who want tires that resist damage and wear under heavier loads.
Less Ideal for: Drivers who mainly seek maximum fuel economy, the lightest possible unsprung weight, or a tire optimized exclusively for quiet highway cruising.
- Reinforced 10-ply construction and tougher sidewalls for improved resistance to punctures and sidewall damage
- Interlocking tread design for more even wear and extended tread life
- Severe snow rated for reliable winter traction
- Universal fit light-truck design with high load capacity suitable for heavy loads and towing
- Heavier LT/E-rated construction can reduce acceleration and lower fuel economy compared with lighter street tires
Verdict: Choose the KO2 when your F-150 needs a tough, long-wearing all-terrain tire that prioritizes durability and reliable traction in harsh conditions.
Cooper Discoverer STT Pro 37×13.50R20LT All-Season Off-Road Tire
| Rim Size | 20 Inches |
|---|---|
| Load Index | 127 |
| Load Capacity | 3860 Pounds |
| Load Range | E |
| Seasons | Year Round |
The Cooper Discoverer STT Pro is a 37×13.50R20LT off-road tire built to handle rock, mud, and trail conditions while remaining usable on pavement. It features Armor Tek3 sidewall reinforcement and stone-deflecting tread channels to reduce damage and lodged rocks when navigating rough terrain. Large tread blocks with mud scoops and climber cleats provide deep bite and self-cleaning for mud and loose soil, so the tire can push through sticky conditions without frequent clogging. On-road it is louder than highway-focused tires and produces a firm ride due to its heavy-duty construction, but many owners report reasonable highway manners and good wet traction for an aggressive design. The load range E and 127 load index mean this tire is suited for heavy trucks and hauling. Expect increased road noise and some rock sling on gravel, and plan for a firmer ride and slightly reduced fuel economy compared with stock highway tires.
Best for: Buyers who want a confidently rugged 37-inch tire for serious off-road use on a heavy pickup and place high value on proven performance and durability from other owners.
Less Ideal for: Drivers who prioritize a quiet, cushioned highway ride or maximum fuel economy should consider more road-focused all-terrain or highway tires instead.
- Very aggressive tread with deep mud scoops and climber cleats for strong off-road traction
- Armor Tek3 sidewall construction improves resistance to cuts and punctures on rocky terrain
- Tread design and stone channels help expel lodged stones and resist damage
- Rated for heavy loads with Load Range E and high load index suitable for trucks and towing
- Noticeably louder and firmer ride on pavement compared with highway tires
Verdict: Choose the Cooper Discoverer STT Pro if you need a 37-inch tire that prioritizes extreme off-road traction and rugged durability for heavy trucks.
Choosing the Right Ford F-150 37 Inch Tires: Key Factors to Consider
Load Rating and Load Index
Load rating determines how much weight each tire can safely carry, and it matters more with 37 inch tires because larger tires are often fitted for trucks that tow or haul. Choosing tires with an appropriate load index prevents premature wear and reduces the risk of tire failure under heavy loads.
When selecting tires for your Ford F-150, match or exceed the vehicle's required load rating and consider the extra stresses of towing or carrying a full payload. Higher load-rated tires often have reinforced construction and stronger sidewalls, which helps maintain stability when cornering and braking under load. Keep in mind that a tire with insufficient load capacity may heat up faster and degrade more quickly when used for towing or heavy-duty tasks.
Tread Pattern and Off-Road Performance
Tread design affects traction in mud, snow, loose dirt, and wet pavement. Aggressive, open tread patterns provide better mud and loose-surface grip, while more closed, siped patterns improve wet and light-snow traction. For F-150 drivers who use 37 inch tires off-road, look for patterns that eject debris and resist stone retention to reduce damage.
Also consider the tradeoff between off-road bite and on-road noise. Deep, widely spaced lugs can increase road noise and reduce ride comfort at highway speeds. Decide how often you will be off-road versus on-road and choose a tread that balances traction needs with acceptable NVH, or noise and vibration, levels for daily use.
Tire Construction and Sidewall Strength
Construction details such as ply rating, internal reinforcement, and sidewall design influence durability and resistance to punctures. Strong sidewalls are important on a Ford F-150 fitted with 37 inch tires because the larger diameter places different stresses on the tire carcass and increases exposure to rocks and trail hazards.
Reinforced sidewalls or protective rubber layers reduce the chance of sidewall cuts when off-roading and help maintain stability when cornering or carrying weight. However, stiffer sidewalls can slightly reduce ride comfort on pavement, so balance protection needs with acceptable ride quality for daily driving.
Treadwear and Longevity
Expected tread life affects long-term ownership cost and convenience. Larger off-road-oriented tires can wear faster on pavement due to softer compounds and aggressive tread designs. Look for tires with documented treadwear ratings, wear indicators, and user-reported longevity relevant to mixed driving conditions.
Maintenance practices like proper rotation, balancing, and alignment significantly influence tread life. When evaluating options for the F-150, factor in how often you drive on paved roads versus trails and whether you will perform regular tire care to maximize lifespan.
Wet and Winter Traction
Wet braking and winter capability are critical for safety, especially if you drive the F-150 in climates with rain, slush, or snow. Tread compounds, siping, and water evacuation channels determine how well a 37 inch tire resists hydroplaning and grips in cold conditions.
If you encounter winter conditions frequently, prioritize tires with proven snow traction and consider whether a dedicated winter tire or a year-round option with winter ratings better suits your needs. Keep in mind that aggressive off-road tires may not perform as well on ice and packed snow unless specifically engineered for winter use.
Fitment, Wheel Offset, and Vehicle Modifications
Installing 37 inch tires on an F-150 often requires attention to wheel offset, backspacing, and potential suspension or fender clearance modifications. Proper fitment avoids rubbing during articulation or full-lock turning and prevents premature wear on suspension components.
Before choosing tires, verify that the wheel and tire combination will clear the wheel wells and allow full suspension travel. Consider whether you prefer a minimal lift or trimming and how changes will affect handling, steering geometry, and alignment specifications. Factor in the cost and complexity of any necessary modifications when making a selection.
How 37 Inch Tires Change F-150 Handling
Fitting 37 inch tires alters steering feel, effective gearing, and center of gravity. Larger tires increase rotational mass and can make steering heavier at low speeds while slightly reducing acceleration and top speed unless the final drive ratio is adjusted.
Expect a modest change in braking distances and brake feel because larger tires have more rotational inertia. Many owners report firmer steering inputs and a taller ride height, which can be beneficial off-road but requires adaptation for precise highway driving.
- Heavier steering at low speeds; consider power steering tune if available
- Slightly reduced acceleration unless gear ratios are adjusted
- Increased risk of rubbing without adequate wheel offset or lift
- Possible need for recalibrated speedometer and odometer
Installation and Alignment Recommendations
Proper installation for 37 inch tires includes a full service alignment and dynamic balancing to minimize vibration and ensure even wear. Larger tires amplify small imbalances and misalignment, which can cause accelerated treadwear and steering wobble.
Ask the installer to check wheel bearing condition, tie-rod ends, and ball joints since the extra load and torque from larger tires can expose worn suspension parts. After installation, recheck torque on wheel fasteners after a short break-in period.
- Perform a full four-wheel alignment after mounting
- Use road-force balancing if vibration persists
- Re-torque lugs after initial drive period
- Inspect suspension components for wear before and after fitting
Maintenance Tips to Maximize Tread Life
Routine maintenance preserves performance and extends the life of 37 inch tires. Rotate tires at regular intervals, monitor inflation pressure frequently, and inspect tread and sidewalls for cuts or embedded objects.
Check tire tread wear indicators and keep a simple record of tread depth. Address alignment or vibration issues early to prevent uneven wear patterns that are more costly to correct on larger truck tires.
- Rotate every 5,000 to 7,000 miles or as recommended for your driving mix
- Maintain proper inflation based on load and driving conditions
- Balance and align promptly if you notice uneven wear or vibration
- Clean debris from tread to prevent stone retention and damage
Choosing Tread Compound for Climate
Tread compound influences grip in different temperatures. Softer compounds bite better in cold or loose conditions but wear faster on hot pavement. Harder compounds last longer but can compromise traction in cold weather.
If you regularly drive in snowy or icy conditions, favor compounds and siping patterns designed for cold traction or consider a separate winter set. For mainly warm-climate, off-road use, a more durable compound will provide longer service life.
- Softer compounds for cold and loose surfaces
- Harder compounds for hot climates and long highway miles
- Look for siping and winter-oriented design if snow is common
Regulatory and Speedometer Considerations
Changing to 37 inch tires affects your truck's effective gearing and will alter speedometer and odometer readings. Confirm local regulations regarding vehicle modifications and ensure any changes remain compliant with inspection requirements.
You may need to recalibrate the speedometer or use a correction module to maintain accurate speed and distance readings. Consider the impact on warranty coverage for suspension components if the change requires significant modifications.
- Verify local inspection and modification rules before fitting
- Recalibrate speedometer to maintain accurate readings
- Understand possible impacts on service warranty related to modifications
Still looking for the perfect fit?
Select your Ford F-150 configuration to see the most relevant Tires recommendations
How We Chose the Best Ford F-150 37 Inch Tires
Our editorial process focused on attributes that matter for 37 inch tires on the Ford F-150 and for owners who use the truck for towing, hauling, and off-road driving. We prioritized load rating and construction because the F-150 often carries heavy loads and may require reinforced sidewalls for larger diameter tires. Tread pattern and compound were weighted heavily to reflect differences in mud/snow traction, wet braking, and highway stability. We also assessed expected tread life and manufacturer's treadwear indicators as proxies for longevity, and considered ride comfort and noise because larger tires can noticeably change on-road refinement. Compatibility with common F-150 wheel offsets and clearances was checked to ensure fitment without extensive suspension modification. Finally, we looked at balancing and alignment considerations specific to larger tires to anticipate installation needs. Excluded from the list were tires that lack sufficient load capacity for typical F-150 payloads, sizes that require major suspension lifts beyond common owner modifications, and tires with documented fitment problems on the F-150. The result is a selection focused on durability, fitment practicality, and predictable on- and off-road performance.
Our full evaluation process is outlined in our review methodology.
FAQ
Will 37 inch tires fit my Ford F-150 without a lift?
It depends on the F-150 configuration and wheel offset. Many stock trucks require a mild lift or different wheel offset to avoid rubbing during full steering lock or suspension travel. Measure clearance and consult fitment guides for your exact setup.
How often should I replace 37 inch tires on my F-150?
Replacement intervals vary with use, but heavy off-road or towing use often shortens tread life. Check tread depth regularly and consider replacement when tread depth reaches legal or safety thresholds, or when you notice uneven wear or damage.
Do 37 inch tires affect my truck's fuel economy?
Yes, larger tires typically increase aerodynamic drag and rolling resistance, which can reduce fuel economy. The effect depends on driving style, terrain, and tire tread design, with aggressive off-road patterns generally having a larger impact.
Can I use 37 inch tires year-round in snowy climates?
Some 37 inch tires are engineered for winter use, but many aggressive off-road tires perform poorly on ice and packed snow. If you face frequent winter conditions, consider dedicated winter tires or choose a 37 inch option with winter ratings and extensive siping.
How do I maintain balance and alignment with larger tires?
Use road-force balancing if standard balancing does not eliminate vibration, and perform a full alignment after installation. Regular inspections and prompt correction of vibration or pull will prevent uneven wear and suspension stress.
What load rating should I look for with 37 inch tires on an F-150?
Select tires with a load index that meets or exceeds your truck's gross vehicle weight and any anticipated towing or payload. Err on the side of higher load capacity if you frequently carry heavy loads or tow trailers.
Final Verdict
When choosing 37 inch tires for a Ford F-150, prioritize load rating, tread design, and construction to match how you drive and what you carry. Balance off-road capability with on-road comfort, and plan for the installation needs such as alignment, balancing, and possible minor suspension adjustments. Focus on fitment practicality and maintenance to get the most from larger tires. By weighing the tradeoffs between traction, longevity, and ride quality, you can select a 37 inch tire that meets your daily driving and work demands with confidence.
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