Are you looking to replace your vehicle’s tires but really don’t have any idea which tire size to choose? Well, you’re not alone! One of the most common dilemmas for vehicle owners is to decide between 225 40r18 and 245 40r18 tire sizes.
While both options have their pros and cons, choosing the right tire size for your vehicle is crucial for safety and performance on the road.
In this article “225 40R18 Vs 245 40R18 Tire Size”, we will provide you with all the necessary information to help you make an informed decision.
225 40R18 Vs 245 40R18 Tire Size: The Table of Differences
This chart shows all the major differences that you must consider first before making any uniform decision regarding choosing any specific tire. Here is the chart: –
| Key Points | 225 40R18 Tire Size | 245 40R18 Tire Size | Differences |
|---|---|---|---|
| Section Width | 8.86 inches | 9.65 inches | 0.79 inches |
| Sidewall Height | 3.54 inches | 3.86 inches | 0.32 inches |
| Overall Diameter | 25.09 inches | 25.72 inches | 0.63 inches |
| Circumference | 78.81 inches | 80.79 inches | 1.98 inches |
| Revs Per Mile | 804 | 784 | 20 |
| Radius | 12.54 inches | 12.86 inches | 0.32 inches |
| Tread Depth | 10/32 inches | 9.5/32 inches | 0.50 inches |
| Rim Width Range | 7.50-9 inches | 8-9.50 inches | 1.5 inches |
| Typical Weight | 24 lbs | 25.4lbs | 1.4 lbs |
| Rim Diameter | 18 inches | 18 inches | None |
| Tire Type | A-Radial Ply Tire | A-Radial Ply Tire | None |
| Sidewall Letters | Black | Black/ white | None |
225 40r18 Vs 245 40r18 Tire Size: A Detailed Analysis
Let us now discuss all the differences in detail so that you may learn everything regarding these tire types. Here goes the discussion: –
Section Width
The section width of a tire is an important measurement that directly impacts its performance and handling characteristics.
This measurement refers to the width of the tire’s tread from sidewall to sidewall, expressed in millimeters.
One of the primary benefits of wider tires with larger section widths is improved traction and stability.
The section width of the 225 40r18 tires is 8.86 inches. Whereas, the section width of the 245 40r18 tires is 9.65 inches. The difference between the two tires in this regard is 0.79 inches or 8.9%.
Sidewall Height
The sidewall height of a tire is also known as the aspect ratio. This measurement is expressed as a percentage of the tire’s section width and represents the height of the tire’s sidewall from the rim to the tread.
One of the primary benefits of tires with higher aspect ratios is improved ride comfort and cushioning.
The sidewall height of the 225 40r18 tires is 3.54 inches. Whereas, the sidewall height of the 245 40r18 tires is 3.86 inches. The difference between the two tires in this regard is 0.32 inches or 8.9%.
Overall Diameter
The overall diameter of a tire is a critical measurement that plays a significant role in your vehicle’s performance and safety.
This measurement represents the total height of the tire from the ground to the top of the tread and it includes the sidewall and the diameter of the rim.
The overall diameter of the 225 40r18 tires is 25.09 inches. On the contrary, the overall diameter of the 245 40r18 tires is 25.72 inches. The difference between the two in this regard is 0.63 inches or 2.5%.
Circumference
The circumference of a tire is the measurement around the outer edge of the tire, which is the distance traveled by the tire in one complete revolution.
A larger circumference tire covers more distance with each rotation, resulting in a higher top speed and more accurate speedometer and odometer readings.
The 225 40r18 tires have a circumference of 78.81 inches. On the other hand, the circumference of the 245 40r18 tires is 80.79 inches. The difference between the two is 1.98 inches or 2.5%.
Revs Per Mile
Revs per mile (RPM) is an important metric to consider when choosing tires for your vehicle. RPM refers to the number of times a tire rotates per mile driven.
This measurement is important because it can influence your vehicle’s speedometer accuracy and fuel efficiency.
The revs per mile for the 225 40r18 tires is 804. Whereas, the revs per mile for the 245 40r18 tires is 784. The difference is 20 or 2.4%.
Radius
The radius of a tire is a crucial measurement that affects several aspects of your vehicle’s performance.
The radius is the distance from the center of the tire to its outer edge, and it plays a significant role in determining the tire’s overall size and shape.
The radius of the 225 40r18 tires is 12.54 inches. On the other hand, the radius of the 245 40r18 tires is 12.86 inches. The difference between the two in this regard is 0.32 inches.
Tread Depth
The tread depth refers to the measurement of the depth of the grooves in the tire’s rubber. The depth of these grooves affects the tire’s ability to grip the road, especially in wet or slippery conditions.
As the tire wears down over time, the depth of the tread reduces and it can reduce the tire’s grip on the road and increase the risk of hydroplaning.
The tread depth of the 225 40r18 tires is 10/32 inches. Whereas, the 245 40r18 tires have a tread depth of 9.5/32 inches. The difference between the two tires in this regard is only half inch.
Rim Width Range
If you want to buy a new set of tires for your vehicle, understanding the rim width range is really very crucial.
The rim width refers to the distance between the two edges of the tire’s mounting surface.
The rim width range is the recommended width of rims that a particular tire size can accommodate.
The rim width range for the 225 40r18 tires is 7.50-9 inches. Conversely, the rim width range for the 245 40r18 tires is 8-9.50 inches. The difference that lies between these two tires is 1.5 inches.
Typical Weight
The weight of tires can vary widely depending on their size, intended use, and the materials used in their construction.
For passenger vehicles, a typical tire can weigh between 20 and 30 pounds, with larger SUV or truck tires weighing upwards of 50 pounds or more.
The typical weight for the 225 40r18 tires is 24 lbs. Whereas, the typical weight for the 245 40r18 tires is 25.4 lbs. The difference between the two is 1.4 lbs.
Rim Diameter
The rim diameter of a tire refers to the size of the wheel onto which the tire is mounted. Rim diameter is an important factor to consider when selecting new tires, as it can influence a vehicle’s handling, ride quality, and overall performance.
The rim diameter of a tire is closely tied to the overall size of the tire. Both tires 225 40r18 and 245 40r18 have the same rim diameter of 14 inches.
Tire Type
Unlike bias-ply tires, which use layers of fabric at angles to each other to support the tire, radial tires use a single layer of steel belts running perpendicular to the tread.
This design provides several benefits, including improved handling, better fuel economy, and longer tread life.
One of the key advantages of radial tires is their improved handling. The steel belts in the tire construction provide a stiffer and more stable base. It is really great to witness that both tires 225 40r18 and 245 40r18 have radial tire construction types.
What Are the Advantages of 225 40R18 Tires?
225 40r18 tires have become increasingly popular among car owners due to their numerous advantages. Some of the main advantages are given below: –
Improved Handling and Stability
One of the significant benefits of 225 40r18 tires is that they offer excellent handling and stability on the road. These tires have a wider tread pattern, which provides better traction and grip, especially during cornering and braking. This results in improved control over the vehicle and increased safety.
Better Performance
The 225 40r18 tire size is a shorter-profile tire that provides better performance than other standard tires. These tires have a shorter sidewall, which reduces the flexing of the tire during acceleration, cornering, and braking. This leads to improved handling and responsiveness, as well as enhanced driving experience.
Improved Fuel Efficiency
Another advantage of 225 40r18 tires is that they can help improve fuel efficiency. These tires have a lower rolling resistance, which means that the tire requires less energy to move forward. As a result, your car can consume less fuel, leading to lower emissions and a reduced carbon footprint.
Stylish Design
The 225 40r18 tire size is a popular choice among car enthusiasts due to its sporty and sleek design. These tires give your car a more aggressive and stylish look, making it stand out on the road.
What Are the Advantages of 245 40R18 Tires?
245 40r18 tires also offer several advantages that make them a popular choice among car owners. Here are some of the benefits: –
Increased Traction
245 40r18 tires have a wider tread pattern than many other tire sizes, which provides better traction and grip on the road. This makes them ideal for high-performance vehicles that require excellent handling and stability.
Improved Braking
Due to the wider tread pattern, 245 40r18 tires offer better braking performance than many other tire sizes. The extra surface area helps to distribute the weight of the vehicle more evenly, which results in shorter stopping distances and increased safety.
Comfortable Ride
Despite their focus on performance, 245 40r18 tires still offer a comfortable ride. The shorter side walls help to absorb shocks and vibrations from the road, providing a smooth and enjoyable driving experience.
Enhanced Performance
With a shorter sidewall than many standard tire sizes, 245 40r18 tires reduce the flexing of the tire during acceleration, cornering, and braking. This leads to improved handling and responsiveness, resulting in a better driving experience overall.
225 40r18 Vs 245 40r18 Tire Size: Additional Chart of Differences
| Key Points | 225 40R18 Tire Size | 245 40R18 Tire Size | Differences |
|---|---|---|---|
| Max Speed | 186 mph | 186 mph | None |
| Max PSI | 50 | 50 | None |
| Max Load | 1389 lbs | 1609 lbs | 220 lbs |
| Aspect Ratio | 40 | 40 | None |
| Actual Speed | 62.14 mph | 60.62 mph | 1.52 mph |
| Speedometer Reading | 100 km/h | 97.55 kmp/h | 2.45 km/h |
| Speedometer Reading Status | Correct | slightly different | None |
Max Speed
- The maximum speed rating is typically indicated by a letter code on the tire’s sidewall.
- Tire manufacturers assign a speed rating to each tire.
- Exceeding the maximum speed rating of a tire can cause the tire to overheat.
The max speed for the225 40r18 tires is 186 mph. The same max speed is also applicable for the 245 40r18 tires. So, in terms of the max speed, there is no difference between the two tires.
Max PSI
- The maximum PSI rating of a tire is the highest amount of air pressure that a tire can safely handle.
- Regular tire maintenance may include checking for leaks and damage.
- It’s important to regularly check and maintain proper tire pressure always.
The max psi for the 225 40r18 tires is 50. The same max psi is also noticeable for the 245 40r18 tires as well. So, in terms of the max psi, there is no difference between the two tires at all.
Max Load
- The load rating of a tire can vary depending on the tire’s size, construction, and intended use.
- Regular vehicle maintenance may prolong the lifespan of tires.
- It’s important to follow the manufacturer’s recommended load capacity.
The max load carrying capacity for the 225 40r18 tires is 1389 lbs. Whereas, the max load carrying capacity for the 245 40r18 tires is 1609 lbs. The difference between the two tires in this respect is 220 lbs.
Actual Speed
- Driving at high speeds can cause tires to generate more heat.
- Drivers should also pay attention to their actual speed when driving always.
- Over inflation or underinflation of tires can cause them to wear unevenly.
The actual speed for the 225 40r18 tires is 62.14 mph. Whereas, the actual speed for the 245 40r18 tires is 60.62 mph. The difference between the two tires in this regard is 1.52 mph.
225 40R18 Vs 245 40R18 Tire Size: Our Opinion
When making a comparison between the 225 40r18 and 245 40r18 tire sizes, it’s important to consider your driving needs. The 245 tire is wider, providing better grip and handling, but it may also result in reduced fuel efficiency.
The 225 tire is narrower, offering better fuel efficiency but slightly less grip. Ultimately, the choice between these two sizes depends on your personal preferences and driving habits.
If you prioritize performance and handling, the 245 40r18 tires may be the better option, while those who prioritize fuel efficiency may prefer the 225 40r18 tires instead.
Tire authentic width Chart for Different Sizes of Tires
This chart provides general guidelines for tire width based on wheel width, but it’s important to consult with a tire professional to determine the best tire size for your specific vehicle and driving needs. Here goes the chart: –
| 5 | 155 | 165-175 | 185 |
| 5.5 | 165 | 175-185 | 195 |
| 6 | 175 | 185-195 | 205 |
| 6.5 | 185 | 195-205 | 215 |
| 7 | 195 | 205-215 | 225 |
| 7.5 | 205 | 215-225 | 235 |
| 8 | 215 | 225-235 | 245 |
| 8.5 | 225 | 235-245 | 255 |
| 9 | 235 | 245-255 | 265 |
| 9.5 | 245 | 255-265 | 275 |
| 10 | 255 | 265-275 | 285 |
| 10.5 | 265 | 275-285 | 295 |
| 11 | 275 | 285-295 | 305 |
| 11.5 | 285 | 295-305 | 315 |
| 12 | 295 | 305-315 | 325 |
| 12.5 | 305 | 315-325 | 335 |
| 13 | 315 | 325-335 | 345 |
Frequently Asked Questions
Which tire size has the best handling, 225 40R18 or 245 40R18?
Generally, the wider tire size of 245 40r18 will provide better handling compared to the 225 40r18 tires.
This is because the wider tire offers a larger contact patch with the road, resulting in more grip and improved stability when cornering or taking turns.
Which tire size has the best looks, 225 40R18 or 245 40R18?
Some people may prefer the narrower profile of the 225 40r18 tires, which can give the car a sleek and sporty look.
Others may prefer the wider stance of the 245 40r18 tires, which can provide a more aggressive and muscular appearance.
Is it possible to replace 225 40R18 tires with 245 40R18?
In most cases, it is possible to replace 225 40r18 tires with 245 40r18 tires. However, it’s important to keep in mind that the two sizes have different widths, which can affect performance and handling.
Which tire size offers better traction 225 40R18 or 245 40R18?
The rule of thumb is that wider tires offer better traction because they have a larger surface area in contact with the road.
In this case, the 245 40r18 tires would have a wider tread than the 225 40r18 tires, which would likely provide better traction.
Final Verdict
After looking at all the important things that we have discussed earlier in this article “225 40R18 Vs 245 40R18 Tire Size,” it is pretty safe to say that both tires have unique abilities to outperform any other tires available in the market.
In terms of popularity and performance, both of these tires have gained significant performance in the marketplace.
So, which tire to choose for your vehicle really depends on your personal preferences and vehicle type. If you want to learn a bit more, feel free to read here.
