Why Upgrade to 37-Inch Tires on Your Jeep Gladiator
The Jeep Gladiator is one of the most capable and customizable off-road platforms ever built. Whether you’re crawling rock trails at Ocala National Forest or cruising down I-75, stepping up to 37-inch tires transforms both the capability and the presence of your rig. It’s the kind of upgrade that changes how your Jeep Gladiator handles terrain — and how people look at it in the parking lot.
At Godspeed Off-Road in Sarasota, Florida, we specialize in building Jeep Gladiator rigs with 37-inch tires that perform on the trail and turn heads on the street. Every build starts with a conversation about how you use your rig — and ends with a vehicle that exceeds your expectations.
Lift Kit Requirements for 37-Inch Tires on the Jeep Gladiator
The Jeep Gladiator’s solid axle design simplifies the lift process compared to independent suspension setups. With solid axles, tire clearance is more predictable — what fits at full droop fits at full compression. That said, you still need quality components to ensure proper geometry and safe handling at highway speeds.
We typically recommend a 3.5 to 4.5-inch lift for running 37-inch tires on the Jeep Gladiator. At 37 inches, you’re stepping into serious build territory. This upgrade demands quality components and professional installation to ensure your Jeep Gladiator performs reliably both on the trail and during your daily commute. The investment pays dividends every time you tackle terrain that would stop a lesser rig. The Gladiator’s Dana 44 axles are robust enough for 37-inch tires in most off-road situations. However, if you’re doing serious rock crawling or hard-core trailing, upgrading the axle shafts to chromoly is cheap insurance against a broken shaft miles from the trailhead.
Regearing Your Jeep Gladiator for 37-Inch Tires
Running 37-inch tires without regearing is one of the most common mistakes we see at our shop. Your Jeep Gladiator likely came from the factory with 3.45 or 3.73 gears with Dana 44 axles front and rear. Those ratios were calibrated for the stock tire diameter — increase that diameter without compensating, and you lose acceleration, towing confidence, and fuel economy while putting unnecessary stress on your transmission.
For 37-inch tires, we recommend 5.13 gears. This ratio restores the mechanical advantage your drivetrain was designed around, keeping RPMs in the sweet spot for both highway cruising and low-speed crawling. Our regearing service includes new ring and pinion sets, fresh carrier bearings, and precision setup with gear marking compound — because a gear install done wrong costs more to fix than doing it right the first time. Learn more about regearing.
Top 37-Inch Tire Brands We Recommend for the Jeep Gladiator
Not all 37-inch tires are created equal. Based on thousands of miles of real-world feedback from our Sarasota builds, here are the brands we trust:
- BFGoodrich KO2 — The gold standard for all-terrain performance. Outstanding sidewall strength, excellent wet and dry traction, and a tread life that justifies the investment.
- Nitto Ridge Grappler — A hybrid all-terrain/mud-terrain that delivers aggressive looks with surprisingly quiet highway manners. One of our most-requested tires for the Jeep Gladiator.
- Toyo Open Country A/T III — Exceptional all-weather capability with a 65,000-mile treadwear warranty. A smart choice for daily-driven rigs that still see trail time on weekends.
- Mickey Thompson Baja Boss A/T — Race-inspired tread design with serious off-road capability. If you want a tire that looks as tough as it performs, this is it.
- Falken Wildpeak A/T3W — Outstanding value without compromising performance. Heat-diffuser technology in the lower sidewall makes this tire remarkably durable in Florida’s heat.
Additional Modifications Worth Considering
Building your Jeep Gladiator for 37-inch tires is a comprehensive project. Beyond the lift and regear, these modifications are essential for a reliable, well-balanced rig:
At this tire size, brake upgrades move from optional to strongly recommended — larger rotors and upgraded calipers ensure your stopping power keeps pace with the added rotating mass. You’ll want 17×9 or 17×10 wheels with aggressive offset for proper clearance, extended brake lines, a heavy-duty steering stabilizer, and high-quality bump stops. Some fender trimming or aftermarket fenders may be necessary for full-turn clearance at full suspension compression. Skid plates, rock sliders, and a reinforced front bumper round out a build at this level.
Frequently Asked Questions
Can I fit 37-inch tires on a stock Jeep Gladiator?
No. Running 37-inch tires on a Jeep Gladiator requires a 3.5 to 4.5-inch lift at minimum, along with several supporting modifications including regearing, brake upgrades, and proper steering geometry correction. This is a comprehensive build that should be planned as a complete package, not pieced together over time.
Do I need to regear my Jeep Gladiator after installing 37-inch tires?
Yes — regearing is essential when running 37-inch tires. Your Jeep Gladiator’s factory 3.45 or 3.73 gears were calibrated for stock tire diameter. Going to 37 inches without regearing to 5.13 causes sluggish acceleration, transmission hunting, increased drivetrain stress, and reduced fuel economy. The regear investment protects your transmission and makes the truck actually enjoyable to drive. Read our complete regearing guide.
What wheel size works best with 37-inch tires on a Jeep Gladiator?
We typically recommend 17×9-inch wheels with -24 to -44mm offset for 37-inch tires on the Jeep Gladiator. This combination provides proper backspacing for brake caliper clearance while giving you the right stance and preventing tire contact with suspension components. Beadlock-capable wheels are worth considering if you plan to air down significantly on the trail.
How do 37-inch tires affect my Jeep Gladiator’s fuel economy?
Expect a decrease of approximately 2 to 4 MPG compared to stock. The larger, heavier tires create more rolling resistance, and the increased rotational mass requires more energy to accelerate. Regearing to 5.13 helps minimize this impact by keeping your engine in its optimal RPM range. Proper tire inflation and a quality alignment also help maintain the best possible fuel economy with your new setup.
What is the total investment for a 37-inch tire and lift package on my Jeep Gladiator?
Every build is different depending on tire brand, lift kit quality, and what additional modifications your specific Jeep Gladiator needs. Rather than quoting a generic number, we prefer to discuss your goals and spec the right package for your rig. Call us at (941) 706-0071 for a personalized consultation — we’ll walk through the options and put together a build plan that matches your budget and your vision.
Ready to Run 37-Inch Tires on Your Jeep Gladiator?
At Godspeed Off-Road, we build Jeep Gladiator rigs that are dialed in — not just bolted on. Every tire and lift package we put together is tailored to your vehicle, your driving style, and how you actually use your rig. We handle everything from the initial consultation through the final alignment, so you drive away with total confidence.
Call us at (941) 706-0071 or stop by the shop at 2858 Clark Road, Sarasota, FL 34231. Let’s talk about your Jeep Gladiator build.