Tire Size 235/45r18 vs 245/45r18
Considering upgrading your vehicle’s tires from 235/45R18 to 245/45R18? Discover the key differences and what to expect in this comprehensive guide tailored for drivers seeking enhanced performance and style.
- Improved traction and grip on both wet and dry roads
- Slightly firmer ride quality due to stiffer sidewalls
- Minimal impact on fuel efficiency with only 1.3% diameter difference
- Increased ground clearance for better off-road performance
- Wider tires provide improved flotation on soft surfaces
Fitment Guide
The diameter difference between 235/45R18 and 245/45R18 tires is 1.3%, which falls within the acceptable range.
However, it’s essential to consider the impact of the increased width on your vehicle’s performance and handling.
On-Road Impact
Switching to wider 245/45R18 tires can significantly influence your driving experience on paved roads. Here’s what you can expect:
- Enhanced traction and grip, particularly during cornering and in wet conditions, thanks to the larger contact patch.
- Improved handling and stability at higher speeds due to the increased tire width.
- Slightly firmer ride quality as wider tires have stiffer sidewalls, which may reduce comfort on rough roads.
- Minimal impact on fuel efficiency, with the 1.3% difference in tire diameter resulting in a negligible change in gas mileage.
- Potential for increased road noise due to the larger tire width and stiffer sidewalls.
Off-Road Impact
If you occasionally venture off the beaten path, here’s how the switch to 245/45R18 tires may affect your off-road experience:
- Improved flotation on soft surfaces like sand or mud, as the wider tires distribute the vehicle’s weight more evenly.
- Slightly increased ground clearance (0.18 inches or 4.5 mm) due to the taller sidewall, which can help navigate obstacles.
- Enhanced traction on loose or slippery surfaces, providing better control and reduced wheel slip.
- Potential for increased tire wear when driving on rough or rocky terrain, as the wider tires are more susceptible to punctures and cuts.
235/45r18 vs 245/45r18
Here is a comparison of the tire sizes 235/45R18 and 245/45R18, detailing their specifications and differences.
| Feature | 235/45R18 | 245/45R18 | Difference |
|---|---|---|---|
| Diameter inches (mm) | 26.33 (668.7) | 26.68 (677.7) | 0.35 (9) +1.3% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) +4.3% |
| Circumference inches (mm) | 82.71 (2100.78) | 83.82 (2129.06) | 1.11 (28.27) +1.3% |
| Sidewall Height inches (mm) | 4.16 (105.75) | 4.34 (110.25) | 0.18 (4.5) +4.3% |
| Revolutions per mile (km) | 766.07 (476.01) | 755.90 (469.69) | -10.17 (-6.32) -1.3% |
| Speedo Reading | 20 mph | 20.27 mph | +0.27 mph |
Difference Between 235/45R18 and 245/45R18
The primary difference between 235/45R18 and 245/45R18 tires is the width, with the 245/45R18 being 0.39 inches (10 mm) wider than the 235/45R18.
Can I Use 245/45R18 Instead of 235/45R18?
Yes, you can use 245/45R18 tires instead of 235/45R18 because the overall diameter difference is only 1.3%, which falls within the acceptable 3% range for tire fitment.
How Much Taller Is a 245/45R18 Tire Than a 235/45R18?
A 245/45R18 tire is 0.35 inches (9 mm) taller than a 235/45R18 tire, resulting in a 1.3% increase in overall diameter.
How Much Wider is a 245/45R18 Tire Than a 235/45R18?
A 245/45R18 tire is 0.39 inches (10 mm) wider than a 235/45R18 tire, which represents a 4.3% increase in tire width.
Our Observation
After analyzing the differences between 235/45R18 and 245/45R18 tires, we’ve concluded that the switch offers several benefits for both on-road and off-road driving.
The wider tires provide improved traction, handling, and stability, while the slight increase in diameter contributes to better ground clearance and a marginally taller stance.
However, it’s crucial to consider the potential drawbacks, such as a firmer ride quality, increased road noise, and accelerated tire wear in off-road conditions. Overall, the differences between these tire sizes are relatively minor and should not cause significant issues for most drivers.
When deciding whether to switch from 235/45R18 to 245/45R18 tires, evaluate your driving habits, vehicle type, and desired performance characteristics.
If improved handling and traction are your primary goals, and you’re willing to accept a slightly firmer ride, then making the switch could be a worthwhile upgrade for your vehicle.
Sabrina Khan Tisha, a lead writer at Tiresizecompare.com, brings a wealth of experience to her role. As the CEO of amarcalculator.com, she oversees a platform offering diverse calculation tools. Sabrina’s background in HR and office management, coupled with her numerous certifications, informs her approach to content creation. Her leadership and expertise contribute significantly to the automotive and calculation sectors.
