How to Air Down a Jeep Gladiator JT: Off-Road Tire Pressure Guide
Jeep Gladiator JT off-road tire pressure guide. PSI by terrain with hose length recommendations.
Vehicle Specs
| Spec | Details |
|---|---|
| Weight Range | 4,600 - 5,500 lbs |
| Wheelbase | 137.3" Single wheelbase across all trims. 17.7" of MFQ+ headroom. |
| Stock Tire Size | 245/75R17 Sport (32"), LT285/70R17 Rubicon and Mojave (33") |
| Common Upgrades |
|
| Recommended Hose Kit | MORRflate MFQ+ |
Recommended PSI by Terrain
| Tire Setup | Street | Gravel | Rock | Sand | Mud | Snow | Min Safe |
|---|---|---|---|---|---|---|---|
| Sport Stock 32" (245/75R17) | 36 | 24-28 | 15-20 | 12-16 | 15-20 | 20-24 | 15 |
| 35" (315/70R17) E-rated | 28-34 | 22-26 | 10-15 | 12-15 | 15-20 | 18-22 | 10 |
| Mojave Stock 33" (285/70R17 Falken Wildpeak A/T LR-C) | 32-36 | 24-28 | 16-20 | 14-18 | 14-20 | 14-18 | 12 |
| Rubicon Stock 33" (285/70R17 Falken Wildpeak A/T LR-C) | 32-36 | 24-28 | 16-20 | 14-18 | 14-20 | 14-18 | 12 |
| Overland Stock (255/70R18) | 36 | 24-28 | 15-20 | 12-16 | 15-20 | 20-24 | 15 |
| Willys Stock (LT255/75R17) | 36-40 | 27-31 | 18-22 | 16-20 | 16-22 | 16-20 | 14 |
Notes
Heavier than JL due to truck bed. Longer wheelbase needs longer hoses. On 35" E-rated, same ranges as JL. Rubicon trim has front and rear lockers and a disconnecting sway bar. Beadlock-capable wheels are a Jeep Performance Parts and Mopar accessory, not a factory option.
Sport Stock 32" (245/75R17): Sport and Sport S (2020-2026): stock 245/75R17 Bridgestone Dueler H/T 685 (Dueler A/T RH-S optional), 17x7.5, per Stellantis spec sheets. Curb 4,662-4,695 lbs automatic (2020-2026 sheets). Heavier than JL due to bed. Longer wheelbase (137.3 in).
35" (315/70R17) E-rated: Aftermarket 35-inch E-rated size (not a factory tire on any Gladiator trim). Beadlock-capable wheels and functional ring kits are sold by Jeep Performance Parts and Mopar as accessories, not as a factory-installed option.
Mojave Stock 33" (285/70R17 Falken Wildpeak A/T LR-C): Mojave is the desert Gladiator. Sand 14-18 is its native terrain -- tighter consensus than Rubicon. Stay on stock unless rock-trail focused.
Rubicon Stock 33" (285/70R17 Falken Wildpeak A/T LR-C): Rubicon (2020-2026): stock LT285/70R17C Falken Wildpeak A/T (Wildpeak M/T optional), 17x7.5, per Stellantis spec sheets. Curb 5,031 lbs automatic, 5,009 manual (2024 spec sheet; 5,072 automatic in 2020-2023). Same OE tire and within 27 lbs of the Mojave on the 2024 sheet, so every PSI cell is adopted from the Mojave row = ESTIMATE by same-tire analogy; no Rubicon-specific forum source verified for this tire. Deep Snow 14-18 matches this tire's Sand range, because off-road deep snow is a flotation job like sand. Beadlock Min 6 applies only with a functional beadlock ring kit installed (Jeep Performance Parts / Mopar accessory).
Overland Stock (255/70R18): Overland (2020-2023 only): stock 255/70R18 Bridgestone Dueler H/T 685 (Dueler A/T RH-S optional), 18x7.5, per Stellantis spec sheets. Curb 4,742 lbs automatic, 4,720 manual (2023 spec sheet). Every PSI cell is adopted from the Sport row (same class: passenger-type standard load, 32-inch, 70 lbs heavier on the 2023 sheet, 7.03 vs 7.25 inch sidewall) = ESTIMATE by analogy; no Overland-specific forum source. Beadlock Min 6 carried from Sport for column completeness; no beadlock-capable 18-inch wheel verified. Load index of the OE tire not verified.
Willys Stock (LT255/75R17): Willys (on the 2023-2026 spec sheets; none on 2020-2022): stock LT255/75R17 Firestone Destination M/T2 (BFGoodrich KM2 optional), 17x7.5. Curb 4,780 lbs automatic, 4,802 manual (2024 spec sheet). ESTIMATE: no Willys-specific forum source. Each PSI cell = the Mojave row x 1.12, rounded (Min Safe and Beadlock Min rounded up). This narrower tire (load index 111) carries about 11 percent less than the Mojave Wildpeak (load index 116) at the same pressure, and the truck is only about 4 percent lighter on the front axle, so it needs about 12 percent more pressure to work equally hard. Load Range C and load index 111 are from retailer listings, not from Firestone or Stellantis. Confirm on the sidewall: it should read LT255/75R17 111/108 with a 50 PSI maximum. A higher load range in this size makes these numbers cautious, not unsafe.
How to Air Down Your Jeep Gladiator JT
- Park on a flat, stable area before the trailhead.
- Set the parking brake and check current tire pressure with a gauge.
- Use your deflator or MORRflate system to release air to your target PSI (see table above).
- Adjust all four tires evenly. Drive a short distance, recheck, and fine-tune.
- Re-inflate before returning to pavement. Low pressures at highway speeds cause heat buildup and blowout risk.
Frequently Asked Questions
What PSI should I air down my Jeep Gladiator to off-road?
Is the Gladiator heavier than a Wrangler? Does that affect tire pressure?
Can I air down my Gladiator with a bed full of gear?
Does the Gladiator Rubicon have beadlocks?
Related Resources
- Beadlock Wheels: Do You Actually Need Them?
- Airing Down 101: The Easiest Upgrade You'll Ever Make
- The Off-Road Tire Pressure Cheat Sheet You'll Actually Save
- SL vs LT Tires: What You Need to Know Before Airing Down
- TPMS and Off-Roading: Why Your Truck Is Screaming at You
- Sidewall Height: Why Your Wheel Size Decides How Far You Can Air Down
- Portable Air Compressor Buyer's Guide
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