2021 Jeep Gladiator Tire Size & Pressure

Quick answer

Here's a quick rundown of the essential tire specs for your 2021 Jeep Gladiator:

• OEM Tire Size:

  • Sport/Sport S: 245/75R17
  • Overland: 255/70R18
  • Rubicon: 315/70R17 (optional 33-inch mud-terrain tires on some models)

• Recommended Cold Tire Pressure (Door Placard):

  • Front: 36 PSI
  • Rear: 36 PSI

• Bolt Pattern: 5x127 (5x5 inches)

• Wheel Size & Offset:

  • Sport/Sport S: 17x7.5 inches, +44.45mm offset
  • Overland: 18x7.5 inches, +44.45mm offset
  • Rubicon: 17x7.5 inches, +44.45mm offset

• Load Index/Speed Rating:

  • Sport/Sport S: 110T (or similar for LT tires)
  • Overland: 113T (or similar for LT tires)
  • Rubicon: 113Q (or similar for LT tires - mud-terrain often have lower speed ratings)

• Spare Tire Size: Matches OEM tire size for the specific trim level.

• TPMS Frequency: 433 MHz

Tire sizes by trim

The 2021 Jeep Gladiator offers a few different tire sizes depending on the trim level:

Trim Level	Tire Size	Wheel Size
Sport	245/75R17	17x7.5
Sport S	245/75R17	17x7.5
Overland	255/70R18	18x7.5
Rubicon	315/70R17	17x7.5

Understanding Your Tire Size

Let's break down a typical tire size like 245/75R17:

• 245: This is the tire's width in millimeters. Wider tires generally offer more grip but can reduce fuel economy.
• 75: This is the aspect ratio, indicating the sidewall height as a percentage of the tire's width. A higher number means a taller sidewall, which can improve ride comfort and off-road capability.
• R: Stands for "Radial," the construction type of the tire.
• 17: This is the diameter of the wheel in inches.

Recommended replacement tires

When it's time for new tires, consider these popular options for your 2021 Jeep Gladiator:

• BFGoodrich All-Terrain T/A KO2 (Premium - $$$): A legendary all-terrain tire perfect for Gladiator owners who split their time between pavement and trails. Known for excellent traction, durability, and a rugged look.

• Falken Wildpeak A/T3W (Mid-Range - $$): A fantastic all-around tire that performs well in various conditions, including light snow. Offers a good balance of off-road capability, on-road comfort, and value.

• Goodyear Wrangler UltraTerrain AT (Mid-Range/OEM - $$): Often a factory option, this tire provides solid all-terrain performance and a good blend of on-road manners and off-road grip. A reliable choice for everyday driving and weekend adventures.

• Nitto Ridge Grappler (Premium - $$$): A hybrid terrain tire that bridges the gap between an all-terrain and a mud-terrain. It offers aggressive styling and impressive off-road traction without sacrificing too much on-road comfort.

When to inflate to max load psi

For a light-duty truck like the Jeep Gladiator, you typically do not need to inflate your tires to the "max load PSI" listed on the tire's sidewall. This pressure is the maximum the tire can safely handle for its maximum load capacity, which is usually far greater than what your Gladiator will carry.

Always refer to the tire placard located on the driver's side door jamb for the recommended cold tire inflation pressure for your specific vehicle. This pressure is optimized for ride comfort, handling, fuel economy, and tire longevity under normal driving conditions and load.

Only consider increasing tire pressure above the door placard recommendation if you are carrying a particularly heavy load (e.g., towing a heavy trailer or fully loading the bed with cargo) and even then, only increase it incrementally and monitor tire wear and handling. Never exceed the max PSI stamped on the tire's sidewall.

Lug nut torque & pattern

Properly torquing your lug nuts is crucial for safety and to prevent damage to your wheels. For the 2021 Jeep Gladiator:

• Lug Nut Torque: 130 ft-lbs (176 Nm)

• Torque Pattern: Always use a star or criss-cross pattern when tightening lug nuts. This ensures even pressure and helps to properly seat the wheel against the hub. Tighten each lug nut incrementally in a few passes until the final torque specification is reached. For example, tighten all nuts to half torque, then three-quarters torque, then full torque.

Common tire issues for this vehicle

Jeep Gladiators are robust vehicles, but like any vehicle, they can experience common tire-related issues:

• Uneven Tire Wear: This can be caused by improper tire pressure (under or over-inflation), worn suspension components, or a lack of regular tire rotations and wheel alignments. Keep an eye out for feathering, cupping, or excessive wear on one side of the tire.

• TPMS Malfunctions: The Tire Pressure Monitoring System (TPMS) may occasionally trigger a warning light due to a faulty sensor, a dying sensor battery, or a significant drop in tire pressure. If the light comes on, it's best to check your tire pressures manually.

• Road Hazard Damage: Given the Gladiator's off-road inclinations, tires are more susceptible to punctures, cuts, and sidewall damage from rocks, debris, and other obstacles encountered on trails. Inspect your tires regularly, especially after off-road excursions.

• Noise and Vibration: Aggressive off-road or mud-terrain tires, especially on Rubicon models, can sometimes produce more road noise and vibration than standard all-season tires. If you notice unusual or excessive noise/vibration from your tires, it could indicate an issue with tire balance, alignment, or damaged tires.

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