You’ll want the Cooper Discoverer AT3 4S for its 65,000-mile warranty and snow-rated performance, the AT3 LT for its 2,680-pound load capacity and shredding resistance, or the standard A/T3 for aggressive off-road traction with daily drivability. All three feature silica-based compounds, reinforced sidewalls, and versatile tread designs that handle mud, rock, and sand while maintaining highway comfort. Match your tire’s load index and speed rating to your Gladiator’s demands, and you’ll discover exactly which setup fits your adventures ahead.
| Cooper Discoverer AT3 4S All-Season 235/70R17XL 109T Tire |  | Best for Severe Weather | Tire Size: 235/70R17XL | Load Index: 109T | Treadwear Warranty: 65,000 miles | VIEW LATEST PRICE | Read Our Analysis |
| Cooper Discoverer AT3 LT All-Season LT215/85R16 E 115R Tire |  | Heavy-Duty Workhorse | Tire Size: LT215/85R16 | Load Index: 115R | Treadwear Warranty: 60,000 miles | VIEW LATEST PRICE | Read Our Analysis |
| Cooper Discoverer A/T3 Traction Radial Tire – 245/70R17 110T |  | Rugged Off-Road Choice | Tire Size: 245/70R17 | Load Index: 110T | Treadwear Warranty: Not specified | VIEW LATEST PRICE | Read Our Analysis |
| Cooper Discoverer AT3 4S All-Season 235/70R17XL 109T Tire | | Best All-Around Performer | Tire Size: 235/70R17XL | Load Index: 109T | Treadwear Warranty: 65,000 miles | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Cooper Discoverer AT3 4S All-Season 235/70R17XL 109T Tire
If you’re after a tire that won’t force you to choose between daily comfort and weekend trail capability, the Cooper Discoverer AT3 4S earns its spot on this list. You’ll appreciate its severe weather rating and 20-foot shorter stopping distance on snow compared to competitors.
The 235/70R17XL size delivers solid load capacity with its 109T rating, while the all-terrain tread handles rocky paths and smooth highways equally well. You’re covered for 65,000 miles under the treadwear warranty, so this tire works hard without draining your wallet. Whether you’re commuting through rain or crawling over weekend trails, you’ve found your versatile match.
- Tire Size:235/70R17XL
- Load Index:109T
- Treadwear Warranty:65,000 miles
- Tire Type:All-Terrain, All-Season
- Tread Depth:Not specified
- Construction:Radial (implied)
- Additional Feature:Severe weather rated
- Additional Feature:Stops shorter on snow
- Additional Feature:On-road comfort
Cooper Discoverer AT3 LT All-Season LT215/85R16 E 115R Tire
The Cooper Discoverer AT3 LT All-Season LT215/85R16 E 115R Tire serves as a workhorse for Jeep Gladiator owners who split their time between job sites and weekend trails. Its Durable-Tread Technology resists shredding and chipping when you’re hauling heavy loads across gravel or dirt roads. You’ll appreciate the 60,000-mile treadwear warranty and stopping power that cuts wet-road distance by 10 feet. With 2,680-pound load capacity and 16.5/32nds tread depth, this radial handles farm work and heavy-duty hauling without excessive wear. The 80 PSI max pressure and E load rating guarantee reliability under stress. At 30.31 inches diameter, you’ll need sizing adjustments for a true 37-inch setup.
- Tire Size:LT215/85R16
- Load Index:115R
- Treadwear Warranty:60,000 miles
- Tire Type:All-Season, All-Terrain
- Tread Depth:16.5/32nds
- Construction:Radial
- Additional Feature:Durable-Tread Technology
- Additional Feature:Heavy load capacity
- Additional Feature:Farm work suitable
Cooper Discoverer A/T3 Traction Radial Tire – 245/70R17 110T
Off-road enthusiasts seeking a versatile all-terrain option without sacrificing daily drivability’ll find the Cooper Discoverer A/T3 Traction Radial Tire delivers exactly what your Jeep Gladiator demands. This 245/70R17 tire features a modern, aggressive 5-rib design with a broken center rib that enhances soft surface traction when you’re crawling through mud or loose gravel.
The silica-based tread compound improves wet handling on highways while providing enhanced cut and chip resistance for rocky terrain. Dual draft tread element walls actively reduce stone retention and drilling, protecting your investment during harsh conditions. You’ll appreciate how this tire shifts seamlessly between daily commuting and weekend trail adventures without compromising performance or durability.
- Tire Size:245/70R17
- Load Index:110T
- Treadwear Warranty:Not specified
- Tire Type:All-Terrain (Traction Radial)
- Tread Depth:Not specified
- Construction:Radial
- Additional Feature:Aggressive 5-rib design
- Additional Feature:Silica-based tread compound
- Additional Feature:Stone retention reduction
Cooper Discoverer AT3 4S All-Season 235/70R17XL 109T Tire
You won’t find a true 37-inch tire here—the Cooper Discoverer AT3 4S in 235/70R17 measures just 30 inches in diameter—but that smaller size serves a specific purpose for Gladiator owners who prioritize year-round dependability over maximum ground clearance. You get Adaptive-Traction Technology and Snow Groove Technology that traps snow for winter grip, making this a genuine severe-weather tire. The 13.5/32nds tread depth and 65,000-mile warranty deliver longevity you can count on. At 36.74 pounds with a 2,271-pound load capacity, you’re running lighter than most all-terrains. If you need a stock-height daily driver that handles snow, rain, and light trails without sacrificing ride comfort, this Cooper fits your needs precisely.
- Tire Size:235/70R17XL
- Load Index:109T
- Treadwear Warranty:65,000 miles
- Tire Type:All-Terrain, All-Season, Severe Weather
- Tread Depth:13.5/32nds
- Construction:Radial
- Additional Feature:Adaptive-Traction Technology
- Additional Feature:Snow Groove Technology
- Additional Feature:Aqua Vac Channels
Factors to Consider When Choosing 37 Inch Tires For Jeep Gladiator
Before you drop serious cash on 37-inch tires for your Gladiator, you’ll want to weigh several key factors that directly impact performance and safety. Load capacity, terrain compatibility, tread pattern, sidewall strength, and speed ratings aren’t just specs on paper—they determine how your truck handles everything from rocky trails to highway cruising. Get these right, and you’ll transform your Jeep; get them wrong, and you’re looking at premature wear, poor handling, or worse.
Load Capacity Requirements
Selecting 37-inch tires with adequate load capacity isn’t just a recommendation—it’s a necessity for your Jeep Gladiator’s safety and performance. You’ll need to verify the load index rating matches or exceeds your vehicle’s demands, particularly when hauling gear or towing trailers off-road.
Check your Gladiator’s specifications and compare them against each tire’s load capacity. A tire rated at 109 supports roughly 2,271 pounds, but you’ll want higher ratings for heavy-duty use. Don’t overlook maximum pressure ratings either—they must align with your setup to maintain stability under load.
Finally, examine construction quality. Your tires should handle rocky trails and highway driving without sacrificing load-bearing strength. Choose wisely, and you’ll avoid dangerous failures when it matters most.
Terrain Type Compatibility
Three primary terrain types—mud, rock, and sand—demand distinct tread designs from your 37-inch tires, so you’ll need to match your rubber to where you’ll actually wheel. For mud, you’ll want aggressive, widely spaced lugs that self-clean and prevent caking. Rock crawling requires tough sidewalls with cut and chip resistance, plus sticky compounds that grip slick surfaces. Sand performance depends on flotation—wider tires with rounded profiles that won’t dig in.
You’ll also face mixed terrain, so consider how your choice compromises across conditions. All-terrain tires balance multiple surfaces adequately, while mud-terrain or rock-specific options sacrifice daily drivability for extreme capability. Check your Gladiator’s suspension travel too; your tires must clear the wheel wells during full articulation without rubbing. Choose wisely—you’re stuck with these for thousands of miles.
Tread Pattern Design
Once you’ve matched your tire to the terrain you’ll actually encounter, you’ll want to scrutinize the tread pattern itself—it’s what separates a tire that merely fits from one that truly performs.
Aggressive, deep grooves deliver superior grip on mud, snow, and rocky trails. Wide voids between tread blocks actively shed debris, preventing buildup that kills traction when you’re crawling through muck. Interlocking lugs and siping enhance stability on loose surfaces while maintaining control during technical climbs.
Don’t overlook water evacuation channels—they’re critical for wet-weather safety, channeling water away to prevent hydroplaning at speed. However, you’ll trade some comfort for capability: chunkier patterns generate more road noise and harsher rides on pavement. Balance your priorities. If you split time between highway and wilderness, consider a hybrid design that doesn’t sacrifice daily drivability for weekend dominance.
Sidewall Construction Strength
Tread pattern gets you traction, but your sidewalls take the beating when you’re squeezing between boulders or grinding through sharp shale. You need reinforced construction—multiple layers of rubber and fabric—to survive extreme conditions without failure.
Consider your aspect ratio carefully. Lower ratios sharpen handling but trade comfort on brutal terrain. Thicker sidewalls handle heavy loads and aggressive driving without complaint, essential for your Gladiator’s capabilities.
Don’t overlook advanced materials. Kevlar and synthetic fibers dramatically boost cut and tear resistance where standard rubber fails. These upgrades cost more upfront, but you’ll avoid trail-ending punctures miles from recovery.
Your sidewalls aren’t just structural—they’re armor. Choose construction that matches your wheeling intensity, or you’ll be patching, replacing, and regretting cheap choices when the trail turns nasty.
Speed Rating Importance
You’ll rarely push your Gladiator to its top speed on the trail, but your tire’s speed rating still matters more than you’d expect. Higher ratings deliver better handling and stability when you’re cornering hard or making emergency maneuvers on uneven terrain. Lower-rated tires build excess heat at speed, cutting performance and risking blowouts when you need reliability most.
Match your tire’s rating to your Jeep’s capabilities and how you’ll actually use it. Even off-road, you’re carrying momentum through washes, climbing fire roads, and hitting pavement between trails. A speed rating exceeding your vehicle’s maximum creates a safety buffer for unexpected situations—sudden evasive moves, loaded descents, or that surprise highway stint home. Don’t treat this number as optional; it’s your margin for error when conditions turn against you.
Pressure Specifications Range
Because you’re running 37-inch tires on your Gladiator, you’re working with a pressure sweet spot of 30 to 40 PSI—but don’t just split the difference and call it done. Your vehicle’s weight and how you use it matter. Heavier loads or crawling over rocks? You’ll want the lower end. Daily driving on pavement? Bump it up.
Get this wrong and you’ll pay for it. Over-inflate and you’ll lose grip, wear your centers faster, and bounce over bumps. Under-inflate and your sidewalls flex too much, building heat that risks blowouts when you’re deep on the trail. Check your pressure regularly. These tires aren’t cheap, and neither is getting stranded. Nail your PSI and you’ll boost fuel economy, handling, and tread life all at once.
Weather Performance Needs
Whether you’re crawling through a surprise snowstorm in the mountains or getting hammered by a summer downpour on the highway, your 37-inch tires need to handle whatever the sky throws at you. Prioritize adaptive-traction technology and snow groove designs for superior grip on slick surfaces. You’ll want aqua vac channels to combat hydroplaning when rain gets heavy. Check for silica-based tread compounds—they boost wet traction considerably. Don’t overlook treadwear warranties between 60,000 and 65,000 miles, which signal real durability across seasons. Your Gladiator deserves tires that won’t quit when conditions turn nasty. Match these weather-specific features to your typical driving environment, and you’ll maintain control when others are sliding off the road.
Warranty Coverage Terms
Weather performance only matters if your tires hold up long enough to see every season through. That’s why you need to scrutinize warranty coverage before buying 37-inch tires for your Jeep Gladiator.
You’ll find treadwear warranties spanning 60,000 to 65,000 miles, but don’t assume they’re automatic. Most manufacturers require you to maintain proper inflation and schedule regular checks to keep coverage valid. Standard limited warranties protect against defects in materials and workmanship, shielding you from manufacturing flaws.
Check the fine print for exclusions that could void your protection. Some brands offer 30-day return policies, giving you flexibility if the tires don’t suit your needs. Compare these terms across options—comprehensive coverage directly impacts your long-term investment value.
Frequently Asked Questions
Will 37 Inch Tires Void My Jeep Warranty?
Installing 37-inch tires won’t automatically void your warranty, but damage caused by them—like axle or drivetrain failures—won’t be covered. You’ll keep your powertrain warranty intact unless the dealer proves your tires directly caused the failure.
Do I Need to Regear My Gladiator for 37S?
You’ll likely want to regear. Stock 4.10 or 3.73 gears feel sluggish with 37s, hurting acceleration and fuel economy. Most owners upgrade to 4.56 or 4.88 gears to restore proper power and drivability.
How Much Lift Is Required for 37 Inch Tires?
You’ll need 3.5 to 4.5 inches of lift to properly fit 37-inch tires on your Gladiator. This clears the fenders and prevents rubbing during articulation. You can get away with less, but you’ll sacrifice off-road performance and risk tire damage.
What’s the Speedometer Correction Factor for 37S?
You’ll need a correction factor of approximately 1.12 to 1.15, depending on your specific 37-inch tire’s true diameter. Multiply your speedometer reading by this factor to get your actual speed, or reprogram your Jeep’s computer for accuracy.
Are 37 Inch Tires Street Legal in All States?
You’ll dodge a nightmare of legal headaches—37s aren’t street legal everywhere. Some states ban them outright, others demand fender coverage or specific width limits. Always check your local laws before mounting those monsters.
Conclusion
You’ve got the world at your feet with these Cooper Discoverer options for your Jeep Gladiator. Don’t let tire choices drive you up the wall—match your terrain needs to the right tread pattern, load rating, and seasonality. Whether you’re hitting mud, rocks, or highways, the perfect 37-inch rubber awaits. Now get out there and leave no stone unturned on your next off-road adventure!
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