Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
Upgrading to 37 inch tires changes how your Ram 1500 performs on- and off-road. The right tires affect traction, towing capability, ride comfort, and clearance, so choosing carefully matters whether you drive daily or use the truck for work or adventure. This guide presents six top options shortlisted for the Ram 1500, focusing on real-world concerns like wet and off-road traction, load rating, and expected tread life. Below we summarize the strengths of each shortlisted tire and walk through the decision factors that matter most for Ram 1500 owners. Use the evaluation notes to match a tire to your driving style and vehicle setup.
Looking for other parts? See all Ram 1500 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Cooper Discoverer STT Pro 37×13.50R22LT All-Season Off-Road Tire |  |
| Best Quality Built to a higher standard if you want something more solid | Cooper Discoverer STT Pro 37×13.50R18LT All-Season Off-Road Tire | |
| Best Value The sweet spot between price and what you get | General Grabber X3 37×12.50R18 All-Terrain Radial Tire |  |
| Best Budget The cheapest option that still gets the job done reliably | Prinx HiCountry R/T HR1 37×13.50R20 All-Terrain Light Truck Tire |  |
| Highest Rated A top-rated pick with lots of positive feedback | CROSSWIND M/T Mud-Terrain Radial Tire 37×13.50R24 Load Range E |  |
| Most Popular A crowd favorite that many people choose with confidence | Cooper Discoverer STT Pro 37×13.50R20LT All-Season Off-Road Tire | |
Cooper Discoverer STT Pro 37×13.50R22LT All-Season Off-Road Tire
| Size | 37X13.50R22LT 123Q |
|---|---|
| Load Capacity | 3415 Pounds |
| Load Range | E |
| Construction Type | Radial |
| Ply | 10-Ply |
The Cooper Discoverer STT Pro is built to handle serious off-road use while remaining usable on pavement for a Ram 1500 on 22-inch wheels. It pairs deep, aggressive tread blocks, mud-slinging channels and climber-style sidewall lugs to dig through mud, sand and rocky terrain and to eject stones that could cause damage. Armor Tek3 sidewall construction and stone-deflecting channels increase puncture resistance and help protect the tire when you run over rough trails or obstacles. On-road the tire is noticeably firmer than factory rubber and will give a rougher ride and more road noise, but it maintains predictable traction in wet and mixed conditions thanks to its all-season tread compound. This is a heavy 10-ply, load-range E tire sized for larger Ram 1500 builds and is best matched to lifted or heavily loaded trucks where off-road capability and durability are priorities; expect faster wear and lower fuel economy versus highway-oriented tires. Fitment and load capacity make it suitable for serious trail use on a properly prepared Ram 1500 rather than daily commuting on stock suspension.
Best for: A Ram 1500 owner who runs a lifted or heavily loaded truck and prioritizes extreme off-road capability and durability while still needing acceptable wet-road performance.
Less Ideal for: Drivers who primarily use their Ram 1500 for daily highway commuting, long-distance fuel-efficient driving, or who want a quiet, comfortable factory-like ride should consider less aggressive all-terrain or highway tires.
- Very aggressive tread and sidewall lugs for strong off-road traction in mud, rocks, and loose surfaces
- Armor Tek3 construction and stone-deflecting features increase resistance to cuts and punctures
- All-season compound and non-directional tread provide usable wet-weather traction on pavement
- High load capacity and 10-ply construction support heavy loads and towing on a light truck build
- Stiffer, louder ride and faster rolling resistance compared with highway or all-terrain tires
- Heavier, wider profile increases fuel consumption and may require lift or fender clearance adjustments
Verdict: Choose this tire for a Ram 1500 when extreme off-road grip and reinforced sidewall durability are the top priorities for a lifted or heavily loaded truck.
Cooper Discoverer STT Pro 37×13.50R18LT All-Season Off-Road Tire
| Size | 37X13.50R18LT 124Q |
|---|---|
| Rim Size | 18 Inches |
| Load Capacity | 3525 Pounds |
| Load Range | D |
| Construction Type | Radial |
The Cooper Discoverer STT Pro is built for drivers who push a full-size truck into serious off-road terrain but still need competent on-road manners. Its deep, aggressive tread with Rock Climber sidewall elements and Mud Slingers 2.0 channels provide strong grip in mud, sand, and on rocky trails, while Armor Tek3 construction and stone-deflecting features improve resistance to cuts and punctures. On pavement the tire stays serviceable with predictable handling and acceptable highway noise for an off-road-focused design, and reviewers report solid wet traction and good balance after installation. The tire is marketed as year-round capable and carries a high load index suitable for heavy trucks, but that aggressive pattern will typically mean more road noise and slightly faster fuel consumption than highway tires. Expect strong off-road durability and traction at the cost of a firmer ride and some extra cabin noise compared with less aggressive all-terrain options.
Best for: Drivers who prioritize off-road performance and durability on a 37-inch equipped full-size truck and want a tire that can handle technical trails, mud, and rocks while remaining usable on highways.
Less Ideal for: If you mostly drive long highway miles or want the quietest, most comfortable daily ride, a less aggressive all-terrain or highway tire would be a better match.
- Very aggressive tread and sidewall features for exceptional off-road traction
- Armor Tek3 construction and stone-deflecting design improve durability against cuts and lodged stones
- Designed to clear mud and resist stone retention to maintain bite off-road
- High load capacity suitable for heavy trucks and towing
- More road noise and slightly firmer ride than highway-oriented tires
- Likely lower fuel economy and faster wear on mostly paved driving
Verdict: Choose the STT Pro when you want a 37-inch tire that maximizes off-road traction and durability for an aggressively used Ram 1500 while remaining serviceable on pavement.
General Grabber X3 37×12.50R18 All-Terrain Radial Tire
| Rim Size | 18 Inches |
|---|---|
| Load Index | 128 |
| Load Capacity | 3970 Pounds |
| Load Range | E |
| Tread Depth | 21 32nds |
The General Grabber X3 is built as a heavy-duty all-terrain/mud-terrain tire for light trucks, designed to deliver strong off-road traction while remaining usable on pavement. It uses General's Duragen construction and a 10-ply, load-range E build to resist cuts and chips and support higher payloads, so it is typically chosen for trucks that see rock, mud, and rough trails. The aggressive tread and deep 21/32nds blocks provide bite in loose surfaces and channel mud away, yet reviewers report manageable road noise compared with traditional mud tires. Practical benefits include reinforced sidewall strength, a high 128 load index for heavy-duty use, and year-round rated traction for mixed conditions. Expect a firmer ride and somewhat lower fuel economy than lighter highway tires, and note the 10 PSI maximum pressure listed is atypical and should be confirmed with a pro installer before use. Fitment must match a 37×12.50R18 size and appropriate rim width.
Best for: Buyers who prioritize durability and off-road capability for a Ram 1500 and want a tire that can handle heavy loads and rough trails while still being passable on pavement.
Less Ideal for: Drivers who primarily do long highway commuting, value maximum fuel economy, or want the quietest possible ride should consider more road-focused tires instead.
- Very strong 10-ply, load-range E construction for durability under heavy loads
- Aggressive tread design that provides excellent traction in mud, dirt, and rocky terrain
- High load capacity and 128 load index suitable for heavier light trucks
- Designed for year-round use with cut-and-chip resistant compound
- Heavier and less fuel efficient than highway-focused tires
Verdict: Choose the General Grabber X3 if you need a tough, high-capacity 37-inch tire that prioritizes off-road grip and durability for a Ram 1500.
Prinx HiCountry R/T HR1 37×13.50R20 All-Terrain Light Truck Tire
| Size | 37X13.50R20 |
|---|---|
| Rim Size | 20 Inches |
| Load Index | 127 |
| Speed Rating | Q |
| Load Range | E |
The Prinx HiCountry R/T HR1 is a 37×13.50R20 rugged-terrain tire designed for light trucks that need capable off-road performance without stepping up to premium name-brand pricing. It is intended for mixed use on pavement and rough trails, with a tread pattern that self-cleans snow, mud, and rocks and aggressive sidewall elements to resist damage. The tire carries a 3PMS winter certification and is pinned for studs if you want extra winter bite. Radial construction and internal reinforcements aim to preserve load durability and handling when carrying heavier loads. You also get a quoted 50,000-mile treadwear warranty, which helps with ownership confidence. Trade-offs are typical for this price tier: expect slightly louder road noise and a firmer ride compared with highway-focused tires, and long-term wet braking or high-speed refinement may lag behind premium all-terrain models. For a budget-focused build that needs real off-road capability and winter use, the HiCountry R/T HR1 is a practical choice.
Best for: Drivers fitting 37-inch tires to a Ram 1500 who prioritize capable off-road grip and winter performance on a tighter budget and want a tire rated for heavier loads.
Less Ideal for: Drivers who prioritize the quietest possible highway ride, the highest wet-road braking performance, or those seeking a premium branded tire with top-tier on-road refinement.
- Aggressive tread and sidewall design for improved off-road traction and damage resistance
- 3PMS winter certification and stud-pinning provision for enhanced winter performance
- Radial construction with internal reinforcements for better load durability
- 50,000-mile treadwear warranty provides longer expected service life for the price
- Likely louder and firmer on-road ride compared with highway-oriented tires
- Wet braking and high-speed refinement may not match premium all-terrain competitors
Verdict: A cost-conscious 37-inch choice for Ram 1500 owners who need rugged all-terrain traction, winter certification, and load durability without a premium price.
CROSSWIND M/T Mud-Terrain Radial Tire 37×13.50R24 Load Range E
| Size | 37X13.50R24 |
|---|---|
| Load Index | 120 |
| Load Capacity | 3086 Pounds |
| Load Range | E |
| Construction Type | Radial |
The Crosswind M/T is a mud-terrain radial tire built for light trucks and SUVs and marketed here in a 37×13.50R24 size with a 10-ply, load range E construction. It uses a directional, open tread pattern with wide grooves and wraparound shoulder blocks to eject mud and stones and to boost traction in loose terrain while resisting hydroplaning on wet roads. For Ram 1500 owners running 37s, it delivers strong off-road bite and confident steering response and is durable against cuts and chips thanks to a reinforced tread compound. Users report quieter on-road manners than many M/T tires and acceptable ride quality when compared with premium competitors, though some buyers note faster wear relative to higher-priced brands. Because it is directional, correct mounting direction matters and rotation options are slightly more limited. Overall this tire suits heavy-use light trucks that need aggressive traction and a high load rating without stepping up to an expensive name-brand mud tire.
Best for: Ram 1500 owners who prioritize reliable off-road traction and a high load capacity on 37-inch tires while keeping costs moderate and accepting a value-oriented brand.
Less Ideal for: Drivers who want the longest possible tread life or the absolute quietest highway ride should consider premium-brand all-terrain or highway-terrain options instead.
- Aggressive directional tread with wraparound shoulders for strong mud and off-road traction
- Open, self-cleaning pattern and wide grooves that help eject debris and reduce hydroplaning risk
- 10-ply load range E construction provides a high load capacity suitable for heavy trucks
- Durable tread compound formulated to resist cuts and chipping off-road
- Reportedly quieter and smoother on-road than many comparable mud-terrain tires
- Treadwear may be faster than premium-brand mud-terrain tires under aggressive use
- Directional tread limits rotation patterns, which can affect even wear management
Verdict: If you need aggressive mud-terrain traction and a high load rating for a 37-inch fitment on your Ram 1500 without a premium price, this Crosswind M/T is a practical value choice.
Cooper Discoverer STT Pro 37×13.50R20LT All-Season Off-Road Tire
| Rim Size | 20 Inches |
|---|---|
| Load Index | 127 |
| Speed Rating | Q |
| Load Range | E |
| Seasons | Year Round |
The Cooper Discoverer STT Pro is built for drivers who want extreme off-road capability while keeping usable on-road manners for daily driving. It features deep, aggressive tread blocks, mud-slinging channels, and specialized sidewall climber cleats that bite into rocks and sticky mud, so you can tackle trails, streams, and rough terrain with confidence. Armor Tek3 construction and stone-armoring channels reduce the risk of cuts and lodged stones, which is useful when running large 37-inch tires on a lifted Ram 1500 that sees real trail use. On pavement the tire is louder than highway-focused tires and can hum at higher speeds, but many owners report acceptable highway manners given the tread pattern and robust construction. Expect good longevity compared with other aggressive designs, and be prepared for slightly reduced fuel economy and a firmer ride compared with stock street tires. Overall this tire favors off-road performance and durability while remaining serviceable for highway trips between trailheads.
Best for: Drivers of Ram 1500s who prioritize verified off-road capability and durability for real trail use and want a tire that performs on both rugged terrain and occasional highway driving.
Less Ideal for: Commuters who spend nearly all their miles on highways and want the quietest, most fuel-efficient tire should choose a highway or touring tire instead.
- Very aggressive tread and sidewall climbers for superior rock and mud traction
- Armor Tek3 and stone-armor features improve resistance to cuts and lodged stones
- Deep mud-slinging trenches help self-clean the tread in sticky conditions
- Designed for heavy loads with E load range and 127 load index suitable for larger trucks
- Noticeable road noise and humming at highway speeds compared with highway/all‑season tires
- Heavier and less fuel efficient than smaller or highway-oriented tires
Verdict: If you run 37-inch tires on a Ram 1500 and need proven off-road traction and sidewall protection, the Discoverer STT Pro delivers rugged capability you can trust.
Choosing the Right Ram 1500 37 Inch Tires: Key Factors to Consider
Load Rating and Ply Construction
Load rating determines how much weight each tire can safely carry at its maximum inflation pressure. For Ram 1500 owners who tow or carry heavy payloads, choosing a 37 inch tire with an adequate load index and appropriate ply construction reduces the risk of overheating and structural failure.
Ply or construction notes such as whether a tire is LT-rated, reinforced, or has extra sidewall strength influence long-term durability under load. Also consider recommended inflation pressure for the stated load rating because underinflation under heavy loads accelerates wear and increases rolling resistance, which affects fuel economy and brake performance.
Traction: On-Road, Wet, and Off-Road Performance
Tread design, compound, and siping all combine to determine how a tire grips pavement, wet surfaces, and loose terrain. For a Ram 1500, dependable braking and cornering on wet roads is essential for safety, while aggressive tread blocks and voids help with self-cleaning and traction in mud and deep sand.
Consider how often you encounter rain, mud, or graded trails and prioritize a tread pattern that balances on-road noise with off-road bite. Tires with directional or staggered tread blocks can help evacuate water, while deeper voids and reinforced shoulder blocks improve traction and resistance to sidewall damage off-road.
Size Fitment and Vehicle Clearance
A true 37 inch diameter tire will affect gearing, speedometer accuracy, and wheel well clearance. Confirming fitment with your Ram 1500's wheel offset, suspension lift, and brake clearance is essential to prevent rubbing on fenders or suspension components during full articulation.
Plan for the change in effective gearing and consider whether you will need recalibration or gear changes. Also check the available backspacing and whether trimming, fender flares, or a modest lift will be required. Proper fitment avoids premature wear on steering and suspension components.
Tread Life and Wear Indicators
Treadwear affects long-term cost and replacement frequency. Look for published treadwear indicators, warranty mileage where offered, and tread compound descriptions to estimate how long a 37 inch tire will remain usable under typical Ram 1500 use.
Real-world tread life depends on driving style, load, alignment, and maintenance. Regular rotation and accurate balancing and alignment extend tread life, while aggressive off-road use and carrying heavy payloads accelerate wear. Check for molded wear bars and consider how easy it will be to inspect and monitor remaining tread depth.
Sidewall Strength and Puncture Resistance
Larger off-road tires are more exposed to rocks, roots, and sharp debris. Sidewall construction and protective features like reinforced beads, thickened shoulders, or puncture-resistant layers improve reliability during off-road use and when encountering sharp obstacles.
Stronger sidewalls can slightly increase ride harshness and weight, so owners should weigh the tradeoff between added protection and potential fuel economy impact. For those who frequently run lower pressures for traction, stronger sidewalls help prevent pinch flats and maintain structural integrity.
Noise, Comfort, and On-Road Behavior
Aggressive tread patterns that excel off-road often create more road noise and a firmer ride on pavement. For owners who use the Ram 1500 as a daily driver, choosing a 37 inch tire with optimized block sequencing or staggered patterns can reduce drone while preserving adequate off-road capability.
Consider expected highway noise, steering feel, and vibration. Some tires incorporate variable pitch tread designs or specialized compounds to balance comfort and durability. If daily highway miles are significant, prioritize a tire that offers a reasonable compromise between quietness and traction.
How 37 Inch Tires Affect Vehicle Dynamics
Switching to 37 inch tires alters acceleration, braking distance, and steering responsiveness. Increased rotational mass and a larger rolling diameter typically slow acceleration and change the effective final drive ratio, which can be noticeable when merging or towing.
Braking behavior changes because the larger diameter can increase braking distance slightly if the tire tread or compound does not provide equivalent grip. Steering input may feel heavier, and turning radius can change when wider sections or offset differences are involved.
- Expect a reduction in effective gearing and potentially slower 0-60 times
- Braking distances can lengthen if traction is reduced
- Steering may feel heavier and require recalibration or adjustment
- Suspension geometry and ride height will influence handling after the change
Preparing Your Ram 1500 for 37 Inch Tires
Before installing 37 inch tires verify wheel offset, backspacing, and brake clearance. Measure wheel wells and check for any suspension components that could interfere at full lock and full droop. If necessary, plan for a lift kit or trimming of inner fender liners to ensure safe clearance.
Also inspect wheel bearings, control arms, and tie rods for wear. Heavier tires increase load on steering and suspension parts, so replacing aged components before the upgrade preserves alignment and reduces unpredictable handling.
- Check wheel offset and backspacing against recommended values
- Confirm brake caliper clearance with larger diameter wheels
- Inspect suspension and steering components for wear prior to fitment
Maintenance and Monitoring for Large-Diameter Tires
Larger tires need regular attention to maximize lifespan and safety. Maintain proper inflation to meet the tire's load rating and check pressure when cold. Rotate tires at recommended intervals and inspect for uneven wear patterns that indicate alignment or suspension problems.
Use a tread depth gauge and watch tread wear indicators to decide when to replace tires. Balancing and alignment become more critical with heavier tires to prevent vibration and premature wear, so re-check these after an initial break-in period and annually thereafter.
- Rotate every 5,000 to 7,000 miles or per manufacturer guidance
- Check pressures weekly when used for heavy towing
- Have a professional balance and align after installation and after 5,000 miles
Winter Considerations for 37 Inch Tires
If you drive in cold or snowy conditions, consider tread compound and siping that maintain flexibility in low temperatures. Some 37 inch options perform adequately in light snow, but deep snow and ice often require a specialized winter tire with softer compound and dedicated tread patterns.
Evaluate whether an all-season large-diameter tire meets your winter needs or if you should switch seasonally. Also account for the impact of wider treads on traction in heavy snow and for potential changes in fuel economy during winter operations.
- Check for siping and softer compound ratings for winter use
- Consider seasonal changeover if you face frequent heavy snow
- Confirm load rating and inflation recommendations in cold weather
When to Regear and Recalibrate Speedometer
A 37 inch tire increases effective final drive and can make the speedometer read slower than actual speed. Many owners choose to recalibrate the speedometer electronically or regear the differential to regain lost performance and proper speed readings.
Regearing helps restore acceleration and maintain towing performance. Discuss the tradeoffs with your installer since gear changes are a mechanical investment but can markedly improve drivability when running significantly larger tires.
- Expect a change in speedometer reading; plan recalibration if accuracy is needed
- Regearing restores acceleration and towing capacity when paired with larger tires
- Consult a mechanic to confirm gear ratios compatible with your setup
Still looking for the perfect fit?
Select your Ram 1500 configuration to see the most relevant Tires recommendations
How We Chose the Best Ram 1500 37 Inch Tires
We selected six 37 inch tires that meet fitment and load requirements for the Ram 1500 and that represent the range of use cases owners typically face. Our editorial filters prioritized traction across surfaces, published load ratings and speed ratings appropriate for the vehicle, and construction features that affect durability and puncture resistance. We also considered tread compound and siping patterns for wet and light snow performance, and reviewed stated treadwear warranties and expected mileage where available. We excluded tires that do not list specifications compatible with common Ram 1500 wheel offsets and load capacities, tires intended only for light off-road use that lack on-road safety ratings, and specialty tires built exclusively for racing or passenger cars. Key dimensions that guided inclusion were overall diameter, section width, load index, ply rating or construction notes, and tread design intended for mixed on/off-road service. Final picks balance durability, traction, and ride quality to cover towing, daily driving, and off-road demands while ensuring the tires meet the vehicle's structural and safety needs.
Our full evaluation process is outlined in our review methodology.
FAQ
Will 37 inch tires fit a stock Ram 1500 without modifications?
It depends on the stock wheel offset and suspension setup. Many stock Ram 1500s require a lift, trimming, or different wheel offset to prevent rubbing at full lock or during suspension travel.
How often should I check tire balance and alignment after installing 37 inch tires?
Have balance and alignment checked immediately after installation and again after the first 3,000 to 5,000 miles. Thereafter, annual checks or sooner if you notice vibration or uneven wear are recommended.
Do 37 inch tires affect my towing capacity?
Tire diameter alone does not change the vehicle's manufacturer-rated towing capacity, but load rating and heat management do matter. Ensure the tires you choose have adequate load ratings for the loads you tow and maintain proper inflation to reduce stress.
Are all 37 inch tires suitable for winter driving?
Not all are suitable. Some 37 inch tires are all-terrain with limited winter capability, while others use compounds and siping better suited to cold weather. For consistent snow and ice, a dedicated winter tire is usually safer.
How will 37 inch tires affect fuel economy?
Expect a modest reduction in fuel economy due to increased rolling resistance and weight. Exact impact depends on tire construction, driving habits, and whether you regear to offset the larger diameter.
What maintenance helps maximize tread life on large off-road tires?
Regular rotation, maintaining correct inflation for load, prompt balancing and alignment, and avoiding prolonged underinflation all extend tread life. Also inspect for embedded debris after off-road trips to prevent slow leaks.
Final Verdict
Choosing the right 37 inch tires for your Ram 1500 requires balancing traction, load capacity, and durability while accounting for how the larger diameter affects handling and gearing. Prioritize tires with suitable load ratings and robust sidewalls if you tow or go off-road, and choose tread patterns that match the surface conditions you encounter most. Decide whether you need a tire optimized for on-road comfort or one built for aggressive off-road use, and plan for proper fitment, maintenance, and any recalibration or regearing needed. With those tradeoffs in mind you can select a 37 inch tire that delivers the performance and reliability your Ram 1500 needs.
Explore More:
- Check out all Ram 1500 parts & accessories
- Explore Tires Maintenance & Repair Guides
- Explore Wheels & Tires
- Browse all Auto Parts
