325 65r18 vs 35×12 50r18 Tire Size
When it comes to tires, the numbers don’t always mean what you think they do. Instead of indicating the tire’s width or diameter (as most people would assume), tire sizes have different meanings depending on the tire type and manufacturer. This blog post will compare the 325 65r18 and 35×12 50r18 tire sizes and help you decide which is better for your needs.
325 65r18 vs 35×12 50r18 Table
325 65r18 | 35x12 50r18 |
Overall Diameter 34.63 inches | Overall Diameter 35.03 inches |
Width 12.8 inches | Width 12.52 inche |
Sidewall Height 8.32 inches | Sidewall Height 8.51 inches |
Radial Tire (A Radial-Ply Tire) | Radial Tire (A Radial-Ply Tire) |
Rim Size 18 inches | Rim Size 18 inches |
Circumference 108.81 inches | Circumference 110.04 inches |
Revs Per Mile 582 | Revs Per Mile 575 |
What Does 325 65r18 tire Mean?
The 325 65r18 tire size means that the tire is 325mm wide and has a sidewall height of 65% of the width. The “r” in size means that it is a radial tire. The 18 in this size means that the rim diameter is 18 inches.
What Does 35×12 50r18 Tire Mean?
The 35×12 50r18 tire size means that the tire is 35 inches tire diameter and has a section width of 12.50 inches. The “R” in size means it is a radial tire. The 18 in size means that the rim diameter is 18 inches.
Tire Diameter
One of the main differences between these two tire sizes is the diameter. The 325 65r18 has a diameter of 34.63 inches, while the 35×12 50r18 has a diameter of 35.03 inches. This means that the 35×12 50r18 is a slightly larger tire.
When choosing a tire size, the diameter is one of the most important factors. This is because the more significant the diameter, the taller the tire. This can affect how your vehicle handles and how much ground clearance you have.
Section Width
Another essential difference between these two tire sizes is the section width. The 325 65r18 has a section width of 325mm, while the 35×12 50r18 has a section width of 318mm or 12.50 inches.
This means that the 325 65r18 is a wider tire. The final section difference is 7 millimeters or 0.28 inches. The section width is important because it affects the contact patch. The contact patch is the tire amount in contact with the ground.
Circumference
The circumference is the distance around the tire. The 325 65r18 has a circumference of 108.81 inches, while the 35×12 50r18 has a circumference of 110.04 inches. This means that the 35×12 50r18 is a slightly larger tire. The difference in circumference is about 1.23 inches or 1.1%.
The circumference is crucial because it affects the gear ratio. The gear ratio is the number of rotations of the tire about the number of rotations of the engine. A larger tire will have a lower gear ratio, affecting fuel economy and acceleration.
Revolutions Per Mile
The revolutions per mile are the number of times the tire turns in one mile. The 325 65r18 has revolutions per mile of 582 while the 35×12 50r18 has revolutions per mile of 575.
The difference in revolutions per mile is about 7 RPM or 1.1%. The revolutions per mile are important because it affects the fuel economy. The lower the number of revolutions, the less fuel is used.
Sidewall Height
The sidewall height is the distance from the edge of the tire to the wheel. The 325 65r18 has a sidewall height of 8.32 inches, while the 35×12 50r18 has a sidewall height of 8.51 inches. This means that the 35×12 50r18 is a taller tire. The difference in sidewall height is about 0.2 inches or 2.4%.
The sidewall height is essential because it affects the ground clearance and the vehicle’s height. The taller the tire, the more ground clearance you will have. This can be important if you are driving off-road or in deep snow.
Wheel Size
Both of these tire sizes have a wheel size of 18 inches. This is the most common wheel size for passenger vehicles. The wheel size is important because it affects the size of the contact patch. The larger the wheel, the smaller the contact patch.
Construction Type
Both 325 65r18 and 35×12 50r18 Tire Sizes are radial tires. Radial tires are the most common type of tire. They have a steel belt that runs around the circumference of the tire. The steel belt helps to support the vehicle’s weight and gives the tire its shape.
Conclusion
So, which one should you choose? If you are looking for a wider tire with a shorter sidewall, then the 325 65r18 is the better choice. If you are looking for a taller tire with a longer circumference, then the 35×12 50r18 is the better choice.
Ultimately, the decision comes down to personal preference and what you look for in a tire. If you have any questions, please feel free to contact us. We will help you choose the right tire for your vehicle. Thank you for reading!
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