If you own a 2015 Jeep Grand Cherokee or are planning to buy one, understanding the right tire size is key. Tires affect everything from handling to safety and fuel economy.
Choosing the wrong size can cause problems like inaccurate speed readings or even damage your car. This article explains the recommended tire sizes for the 2015 Grand Cherokee, how to pick the best option, and what happens if you change sizes.
You’ll also find useful tables for comparison, clear examples, and answers to common questions.
Recommended Tire Sizes For 2015 Jeep Grand Cherokee
Jeep offered the Grand Cherokee in various trims in 2015. Each trim had its own standard and optional tire sizes. The most common sizes include:
- 265/60R18
- 265/50R20
- 245/70R17
These numbers can look confusing, but each part has a meaning. The first number is the width (in millimeters). The second is the aspect ratio (height vs width, as a percentage). The “R” stands for radial construction, and the last number is the wheel diameter (in inches).
Tire Sizes By Trim
Here’s a quick breakdown for the main trims:
- Laredo – Usually comes with 17-inch wheels, using 245/70R17 tires.
- Limited & Overland – Standard is 18-inch wheels with 265/60R18, but 20-inch wheels with 265/50R20 are optional.
- Summit – Typically uses 265/50R20 tires.
- SRT – Features performance tires, often 295/45ZR20.
For most drivers, 245/70R17 and 265/60R18 are the most common.
Comparing Tire Sizes And Performance
Choosing the right tire size impacts your Jeep’s ride, handling, and even gas mileage. Here’s a simple comparison:
| Tire Size | Wheel Diameter | Performance | Comfort | Fuel Economy |
|---|---|---|---|---|
| 245/70R17 | 17″ | Balanced | High | Better |
| 265/60R18 | 18″ | Sporty | Good | Average |
| 265/50R20 | 20″ | High | Lower | Lower |
Smaller wheels (17-inch) usually give a softer ride and better gas mileage. Larger wheels (20-inch) look stylish and offer better handling, but can be less comfortable and use more fuel.
How To Read Tire Sizes
Many new drivers miss this. Tire sizes are easy to understand if you break them down:
- Width: First number (265) is tire width in millimeters.
- Aspect Ratio: Second number (60) means the tire’s height is 60% of its width.
- R: Stands for radial tire.
- Diameter: Last number (18) is wheel size in inches.
For example, 265/60R18 means a tire that’s 265mm wide, 60% as tall as it is wide, radial construction, and fits an 18-inch wheel.
Can You Change Tire Sizes?
Yes, you can change sizes but there are limits. The new tire must be close to the original diameter (within 3%). If you go too far, your speedometer will be wrong, and the car might not handle well.
| Original Size | Allowable Change | Risks |
|---|---|---|
| 265/60R18 | 265/65R18 | Possible rubbing, speed error |
| 245/70R17 | 255/70R17 | May affect stability |
A common mistake is picking a tire that’s too wide or tall, thinking it will look good or perform better. But this can cause rubbing or even damage the suspension.
Finding The Right Tire For Your Needs
When picking tires for your 2015 Grand Cherokee, think about:
- Driving style – If you drive mostly in the city, go for comfort (like 17 or 18-inch tires).
- Weather conditions – Wider tires may help in dry conditions, but narrower tires are better for snow.
- Budget – Bigger tires cost more and can increase fuel use.
- Off-road or on-road – Off-road tires are usually taller and wider.
If you have doubts, check your owner’s manual or look inside the driver’s door for a sticker. This shows the factory-recommended sizes.
Tire Brands And Quality
The tire brand matters as much as size. Popular choices for the Grand Cherokee include Michelin, Goodyear, Bridgestone, and Pirelli. High-quality tires last longer and grip better. Cheaper tires may save money at first, but often wear out quickly and can be noisy.
If you want to compare tire brands and read reviews, visit sites like Tire Reviews and More.
Example: Real-world Tire Replacement
Suppose you have a Limited trim with 265/60R18 tires. If you switch to 265/65R18, the tire will be a bit taller. This could make your speedometer read lower than your actual speed. Another non-obvious insight: taller tires can slightly improve ground clearance, but may reduce acceleration.
For those who tow heavy loads, wider tires may help with stability. But they can also make steering heavier.
Frequently Asked Questions
What Is The Standard Tire Size For The 2015 Jeep Grand Cherokee?
The most common size is 265/60R18. Some trims use 245/70R17 or 265/50R20. Always check your trim and the sticker on your driver’s door.
Can I Use 20-inch Tires On All 2015 Grand Cherokee Models?
No. Only certain trims (like Overland and Summit) are designed for 20-inch wheels. Using larger wheels on other models may cause issues with fit or performance.
Will Bigger Tires Affect My Gas Mileage?
Yes. Bigger tires are heavier and increase rolling resistance. This can lower fuel economy by a few percent. It’s a common mistake to ignore this when upgrading tires.
How Do I Know If A Tire Will Fit My Jeep?
Check the bolt pattern and offset for your wheels. Use an online tire size calculator or ask a professional before changing sizes. Going beyond recommended sizes can cause rubbing or handling problems.
Are All-season Tires Good For The Grand Cherokee?
All-season tires work well for most drivers. If you drive in snow or mud often, consider all-terrain or winter tires. These offer better grip and safety.
If you need more details, the official Jeep website has helpful resources: Jeep Grand Cherokee Official Site.
Choosing the right tire size for your 2015 Jeep Grand Cherokee keeps your drive smooth, safe, and efficient. Take time to check your trim, consider your needs, and use trusted brands. Upgrading your tires is easy if you follow these tips and avoid common mistakes. With the right choice, your Jeep will perform its best for years to come.
