If you're interested in the Jeep Wrangler, you might wonder about the size of its tires. The tires are not just for looks—tire size affects ground clearance, off-road ability, ride comfort, and even fuel economy.
Whether you’re planning to keep your Wrangler stock or want to upgrade for off-roading, understanding tire sizes is important. Let’s break down everything you need to know about Jeep Wrangler tires, from factory sizes to popular upgrades, and what really matters when choosing the right set.
Standard Jeep Wrangler Tire Sizes
The Jeep Wrangler comes in several models and trims. Each one can have different tire sizes, depending on the year and options. Here’s a quick look at the most common factory tire sizes for recent Jeep Wrangler generations.
| Model Year | Trim | Stock Tire Size |
|---|---|---|
| 2018–2024 (JL) | Sport | 245/75R17 |
| 2018–2024 (JL) | Sahara | 255/70R18 |
| 2018–2024 (JL) | Rubicon | 285/70R17 |
| 2007–2017 (JK) | Sport | 225/75R16 |
| 2007–2017 (JK) | Rubicon | 255/75R17 |
Most stock Jeep Wrangler tires range from 29 inches to 33 inches in overall diameter. The Rubicon models, designed for off-roading, usually have the largest factory tires.
Understanding Tire Size Numbers
The numbers on your Jeep tire, like 285/70R17, tell you a lot about its dimensions:
- 285 = tire width in millimeters
- 70 = sidewall height as a percentage of width (aspect ratio)
- R17 = fits a 17-inch wheel
To get the overall diameter in inches, you use a simple formula:
- Multiply the width by aspect ratio (as a decimal), then by 2 (for both sidewalls)
- Convert millimeters to inches (divide by 25.4)
- Add the wheel diameter
For example, a 285/70R17 tire:
- Sidewall height: 285 × 0.70 = 199.5mm
- Both sidewalls: 199.5 × 2 = 399mm
- Sidewalls in inches: 399 / 25.4 ≈ 15.7 inches
- Total diameter: 15.7 + 17 = 32.7 inches
Many tire shops and websites offer a tire size calculator to make this process easier.
Popular Tire Upgrades
Many Jeep owners upgrade their tires for better off-road performance or a more aggressive look. Here are some popular upgrade sizes:
- 33-inch tires (285/70R17, 285/75R16) – Fit most Wranglers with little or no modification.
- 35-inch tires (315/70R17) – Popular for off-roading, often require a lift kit.
- 37-inch tires (37×12.50R17) – Maximum size for extreme off-roading, needs major upgrades.
| Tire Size | Diameter (inches) | Width (inches) | Recommended Modifications |
|---|---|---|---|
| 33-inch | 32.8–33 | ~11.2 | None or small lift |
| 35-inch | 34.5–35 | ~12.5 | 2–2.5″ lift |
| 37-inch | 36.8–37 | ~12.5 | 3.5″+ lift, re-gearing |
Insight: Going bigger than stock will affect your speedometer, fuel mileage, and sometimes the warranty. Not all tire sizes fit every Wrangler without changes.
What Affects Tire Fitment?
Upgrading Wrangler tires is not just about picking a bigger size. Several factors affect whether a tire will fit:
- Lift height: Bigger tires need more space, so adding a lift kit is common.
- Wheel offset and backspacing: These measurements control how far the tire sticks out. Too much can cause rubbing.
- Fender clearance: Large tires can hit the fenders, especially off-road.
- Axle gearing: Bigger tires can reduce power and acceleration; re-gearing may be necessary.
Beginners often forget about backspacing and gearing. Choosing tires that are too wide or tall can lead to poor driving performance or even damage if not handled properly.
Pros And Cons Of Larger Tires
Larger Jeep tires offer several advantages, especially for off-roading, but there are trade-offs.
Benefits:
- More ground clearance – Help avoid rocks and obstacles.
- Better traction – Wider, taller tires grip better on dirt and mud.
- Aggressive look – Many owners prefer the rugged style.
Drawbacks:
- Reduced fuel economy – Heavier, larger tires make the engine work harder.
- Slower acceleration – Bigger tires can hurt performance unless gears are upgraded.
- Extra cost – Larger tires require new wheels, lift kits, and possibly new gears.
- Possible warranty issues – Some dealers may not cover suspension or axle problems after big upgrades.
Real-world Examples
Let’s look at a few real Jeep Wrangler setups:
- Daily driver: 2023 Wrangler JL Sport with 245/75R17 (around 31.5 inches). Good for city and highway.
- Mild off-roader: 2019 Wrangler JL Rubicon with 285/70R17 (about 33 inches). Handles trails and rocks.
- Hardcore off-roader: 2015 Wrangler JK with 37×12.50R17 and 4-inch lift. Needs new gears, reinforced axles, and upgraded brakes.
Owners often start with a 33-inch tire for a balance of looks and performance. Moving up to 35 or 37 inches is mostly for serious trail use.
When To Change Tire Size
Not sure if you should upgrade? Here’s when a bigger tire makes sense:
- You want to do more off-roading or rock crawling.
- You plan to install a lift kit for more clearance.
- You prefer a more aggressive look and don’t mind the extra cost.
- Your current tires are worn and you want to try something different.
If you mostly drive on pavement, sticking with factory sizes or just one size up is often best.
Frequently Asked Questions
How Do I Know What Size Tires Fit My Jeep Wrangler?
Check your Jeep’s owner’s manual or the sticker inside the driver’s door. It lists the recommended sizes. You can also use online fitment guides or speak to a reputable tire shop.
Will Bigger Tires Affect My Jeep’s Warranty?
Some dealerships may void parts of your warranty if you install oversized tires without other necessary upgrades. Always ask your dealer before making changes.
Can I Put 35-inch Tires On My Stock Jeep Wrangler?
You can fit 35-inch tires on some models (especially Rubicon) with minimal modification, but most Wranglers need a 2-inch lift to avoid rubbing and maintain safe driving.
What’s The Biggest Tire I Can Run Without A Lift?
Most Wranglers can handle up to 33-inch tires (like 285/70R17) with no lift or just a small leveling kit. Anything larger usually needs more modifications.
Where Can I Learn More About Jeep Wrangler Tire Sizes And Modifications?
A good source is the Jeep Wrangler Wikipedia page for general info, or dedicated Jeep forums for real-world advice.
Choosing the right tire size for your Jeep Wrangler depends on how you use your vehicle, your budget, and your willingness to make upgrades. Take time to research, measure carefully, and ask other Jeep owners about their experiences.
The right tires will help you get the most out of your Wrangler on and off the road.
