If you’re thinking about installing 245/75R17 tires on your Jeep Grand Cherokee, you’re probably wondering if they’ll fit, how they’ll perform, and what you need to consider. Tire size changes can affect your vehicle’s look, handling, and safety.
Let’s break down everything you need to know about this popular tire upgrade, focusing on all the key factors and real-world examples. By the end, you’ll have a clear answer for your Grand Cherokee, along with practical advice and answers to common questions.
What Does 245/75r17 Mean?
The tire size 245/75R17 has specific meanings:
- 245: Tire width in millimeters.
- 75: Sidewall height as a percentage of width (75% of 245 mm).
- R17: Radial construction, fits a 17-inch wheel.
Compared to stock tires on most Grand Cherokees, 245/75R17 is usually taller and sometimes a bit wider. This affects clearance, speedometer reading, and handling.
1. Stock Tire Sizes
Most Jeep Grand Cherokees use tire sizes like 265/60R18, 245/70R17, or 265/50R20. The 245/75R17 tire is taller, with a larger sidewall. This means:
- More ground clearance
- Softer ride
- Possible speedometer error
Check your owner’s manual for your model’s original tire size.
2. Wheel Compatibility
245/75R17 tires require 17-inch wheels. If your Grand Cherokee has 18-inch or 20-inch wheels, you’ll need new wheels that are 17 inches in diameter. The wheel width should be between 6.5″ and 8″ for this tire.
| Wheel Size | Fits 245/75R17? |
|---|---|
| 17″ | Yes |
| 18″ | No |
| 20″ | No |
3. Clearance And Rubbing
245/75R17 tires are taller than most stock sizes. On older Grand Cherokee models (like WJ or WK), they may fit without modification. On newer models (WK2), you might have rubbing issues, especially when turning or going over bumps. This usually happens in the wheel well or on suspension components.
4. Suspension Lift
If you experience rubbing, a small suspension lift (1–2 inches) can help. It raises your vehicle, giving more room for larger tires. However, this also changes the ride and may affect warranty.
5. Speedometer And Odometer Accuracy
A taller tire means your speedometer and odometer will read slightly lower than actual speed and distance. For example, at 60 mph, you might really be going 63 mph. You can fix this with a speedometer calibration tool.
6. Ride Quality
The higher sidewall of a 245/75R17 tire absorbs bumps better, giving a smoother ride. This is a benefit for off-road and rough roads, but may feel “floaty” at high speed.
7. Handling And Stability
Larger tires can decrease handling sharpness, especially in corners. The taller sidewall flexes more, so steering may feel less precise.
For daily driving, most users find the difference minor.
8. Fuel Economy
Bigger tires are heavier and require more energy to turn. You may see a 1–3 mpg drop in fuel economy, especially if the tires are more aggressive (like mud-terrain types).
9. Tire Pressure
Always set tire pressure according to the tire manufacturer’s recommendation, not just the Jeep’s factory sticker. Most 245/75R17 tires run best at 35–40 psi.
10. Off-road Performance
The 245/75R17 size is popular for off-roading. It gives more ground clearance and protects your wheels. Many Jeep Grand Cherokee owners choose this size for better performance on trails, sand, and snow.
11. Road Noise
Tire tread affects noise more than size. If you pick all-terrain or mud-terrain tires, expect more road noise compared to stock tires.
12. Tire Brands And Options
Many brands offer 245/75R17 tires. Popular models include:
- Goodyear Wrangler
- BFGoodrich All-Terrain T/A KO2
- Michelin Defender
- Falken Wildpeak A/T3W
- Cooper Discoverer AT3
Each offers different tread patterns and performance. Check reviews for your needs.
13. Load Rating
A 245/75R17 tire’s load rating is usually between 2,400–2,700 lbs per tire. This is more than enough for the Grand Cherokee, unless you regularly haul heavy loads or tow.
14. Price
Prices range from $140 to $220 per tire, depending on brand and tread. Shop around for deals and installation packages.
| Tire Model | Price (each) |
|---|---|
| Goodyear Wrangler | $180 |
| BFGoodrich KO2 | $210 |
| Falken Wildpeak | $170 |
15. Tire Weight
Heavier tires can stress your suspension and impact acceleration. 245/75R17 tires typically weigh 40–50 lbs each, versus 30–35 lbs for smaller stock tires.
16. Appearance
This size gives your Jeep a rugged, off-road look. The bigger sidewall and wider tread fill the wheel wells better.
17. Legal And Warranty Concerns
Changing tire size may affect your vehicle warranty and could be illegal in some regions if it changes ride height too much. Always check local laws and dealer policies before making changes.
