The 245/70R17 tire measures 30.5 inches (775 mm) in overall diameter, 9.65 inches (245 mm) in tread width, and fits a 17-inch (431.8 mm) wheel. Its sidewall height is 6.8 inches (172 mm), with a circumference of 95.9 inches (2437 mm), giving about 660 revolutions per mile (410 per kilometer).
This size offers a balance of comfort, traction, and stability, making it a reliable choice for SUVs and trucks used for daily driving, towing, or light off-road adventures.
I also write blogs on different more Tire Sizes, check it for more information to help you make better decisions.
245/70R17 Tire Size in Inches & Metric
Here’s a quick reference table to make it easier to visualize the 245/70R17 tire size in both inches and millimeters:
| Measurement | Inches | Metric (mm) |
|---|---|---|
| Circumference | 96.1″ | 2436.6 mm |
| Sidewall Height | 6.8″ | 172 mm |
| Tread Width | 9.6″ | 245 mm |
| Revolutions/Mile | 659 | 410/km |
| Overall Diameter | 30.6″ | 776 mm |
These numbers are helpful when choosing replacement tires or comparing tire sizes. A slight difference in diameter can impact speedometer accuracy, fuel efficiency, and overall performance.
Breaking Down the 245/70R17 Tire Size
Every part of 245/70R17 tells you something important about the tire:
- 245 – This is the tire’s width in millimeters, measured from one sidewall to the other. In inches, this is about 9.65 inches.
- 70 – This represents the aspect ratio, meaning the sidewall height is 70% of the tire’s width. A higher aspect ratio generally means a smoother ride.
- R – This stands for radial construction, which is the most common type of tire construction today. Radial tires have better grip, longer life, and improved fuel efficiency.
- 17 – This tells you the wheel diameter in inches. This tire is designed to fit a 17-inch wheel.
These details matter because they affect how your vehicle handles, how comfortable the ride feels, and how well your tires grip the road.
Converting 245/70R17 in Inches – A Simple Guide
To get a better idea of the actual size of a 245/70R17 tire, let’s convert the key measurements into inches:
- Tire Width: 245 mm ÷ 25.4 = 9.65 inches
- Sidewall Height: 9.65 inches × 0.70 = 6.76 inches
- Total Tire Diameter: (6.76 inches × 2) + 17 inches = 30.52 inches
- Tire Circumference: 30.52 inches × 3.1416 = 95.89 inches
- Revolutions per Mile: (63,360 ÷ 95.89) ≈ 661 revolutions per mile
How 245/70R17 Tires Impact Your Driving Experience?
Tire size isn’t just about fitting your wheels—it affects how your vehicle handles, rides, and performs. Here’s how 245/70R17 tires can influence your driving experience:
Ride Comfort: A Smoother Drive
One of the biggest advantages of 245/70R17 tires is their higher sidewall height. This extra cushioning helps absorb shocks from bumps and potholes, making your ride smoother and more comfortable—especially if you drive on rough roads or off-road terrain.
Speedometer Accuracy: Why Size Matters
Your speedometer is calibrated for a specific tire size. If you switch to a different size, it can throw off your speed readings. Since 245/70R17 tires have a larger diameter than some other sizes, they might cause your speedometer to underestimate your actual speed slightly.
Fuel Efficiency: How Tire Size Affects MPG
Larger tires can increase rolling resistance, which means your engine has to work harder to move them. While 245/70R17 tires are designed to balance size and efficiency, they may reduce fuel economy slightly compared to smaller tires. However, their optimized tread design can help maintain efficiency on highways and overall MPG.
Handling & Stability: The Balance Between Grip and Control
- The wider tread of a 245/70R17 tire gives you better road grip, improving traction on wet or slippery roads.
- The higher sidewall can cause a slight decrease in cornering stability, especially at high speeds, compared to lower-profile tires.
- These tires perform well in off-road conditions, thanks to their stronger sidewalls and enhanced traction on uneven surfaces.
Comparing 245/70R17 to Other Common Tire Sizes
How does 245/70R17 compare to other popular tire sizes? Let’s break it down:
245/70R17 vs. 235/75R15 – Narrower but Taller Sidewall
- 235/75R15 tires are narrower (235mm vs. 245mm) but have a higher aspect ratio (75% vs. 70%), meaning a taller sidewall for more shock absorption.
- The smaller 15-inch wheel makes them a better option for comfort and fuel efficiency, but they may lack the same traction and load capacity as 245/70R17 tires.
245/70R17 vs. 265/70R16 – Wider Footprint for Better Grip
- 265/70R16 tires are wider (265mm vs. 245mm), offering better traction for off-road and heavy-duty use.
- They have a slightly smaller wheel size (16″ vs. 17″), which could provide a smoother ride, but they might not handle corners as well as 245/70R17 tires.
Quick Comparison: 245/70R17 vs. Other Tire Sizes
| Tire Size | Width (inches) | Sidewall Height (inches) | Wheel Size (inches) | Best For |
| 245/70R17 | 9.65″ | 6.76″ | 17″ | Balanced performance |
| 235/75R15 | 9.25″ | 6.94″ | 15″ | Comfort & fuel economy |
| 265/70R16 | 10.43″ | 7.29″ | 16″ | Off-road traction |
Final Thoughts
Understanding 245/70R17 tires helps you make a smarter choice when replacing or upgrading your tires. Their balanced width, sidewall height, and durability make them a great option for SUVs, trucks, and off-road vehicles. Whether you’re looking for comfort, stability, or traction, these tires offer a solid mix of performance and reliability.
Before buying, always check your vehicle’s manufacturer recommendations, consider your driving conditions, and pick a tread pattern that suits your needs. With the right 245/70R17 tires, you’ll enjoy a smoother, safer, and more efficient drive!
If you ever face issues with your wheels, our professional tire repair service can help keep you on the road safely.
FAQs
Q. What vehicles use 245/70R17 tires?
These tires are commonly found on SUVs, trucks, and off-road vehicles, offering a mix of comfort, traction, and durability.
Q. Can I replace 245/70R17 with a different size?
Yes, but you should check your vehicle’s manual or consult a tire expert to ensure proper fitment and performance.
Q. Are 245/70R17 tires good for off-roading?
Yes! Their strong sidewalls and wide footprint provide better traction and durability on rough terrains.
Q. How often should I replace my 245/70R17 tires?
Tires should be replaced every 5-6 years or sooner if tread wear, cracks, or damage appear. Regular rotations and inspections help extend lifespan.
