Tire Size Specification
Verified OEM & Service Reference2021 Jeep Gladiator 3.6L Pentastar V6 (JT) — Tire Size
Recommended interval: Rotate every 5,000–7,500 miles; check cold PSI monthly
Engine / Trim Variant
Factory Tire Size
255/70R18 / 285/70R17 / 245/75R17 / 255/75R17
Quick Purchase
Check verified fitment on Amazon
Technical Specifications
| Front Tire Size | 255/70R18 / 285/70R17 / 245/75R17 / 255/75R17 |
|---|---|
| Rear Tire Size | 255/70R18 / 285/70R17 / 245/75R17 / 255/75R17 |
| Rim / Wheel Size | 18" |
| Matched Trims | 80th Anniversary Edition, High Altitude, Mojave |
Compatible Aftermarket Options
Direct OEM cross-references- Buy Michelin / Continental / Pirelli 255/70R18 on AmazonMichelin / Continental / Pirelli255/70R18
Search query: 255/70R18 tire
Tire Size Fitment by Engine / Trim (2021 Jeep Gladiator)
| Engine / Trim | Oil Spec & Capacity | OEM Oil Filter |
|---|---|---|
| 3.6L Pentastar V6 | 0W-20 • 5.0 qt (4.7L) | 68191349AC |
| 3.0L EcoDiesel V6 | 5W-40 • 9.0 qt (8.5L) | 68507598AA / 68498720AA |
DIY Fitment & Verification Checklist for 2021 Jeep Gladiator
- Confirm your engine code or trim variant above before ordering parts, as mid-year production changes can affect tire size fitment.
- When purchasing OEM or aftermarket brands (Motorcraft, ACDelco, Mopar, Wix, Fram, Mobil 1, Bosch, NGK), cross-check the Amazon Garage Confirmed Fit badge with your 17-digit VIN.
- Always consult your 2021 Jeep Gladiator owner's manual for exact torque specs and fluid service intervals.
Sources: NHTSA vPIC & OEM Service SpecificationsReport an inaccurate spec or part number
Frequently Asked Questions
What is the OEM tire size specification for a 2021 Jeep Gladiator?
The primary OEM tire size part number / specification for the 2021 Jeep Gladiator 3.6L Pentastar V6 (JT) is 255/70R18 / 285/70R17 / 245/75R17 / 255/75R17.
Which aftermarket tire size brands fit the 2021 Jeep Gladiator?
Compatible aftermarket options include Michelin / Continental / Pirelli 255/70R18.