285 65r18 vs 33×12 50r18 Tire Size
Many numbers and letters are involved, which can make things seem pretty complicated. However, finding new tires should be much easier if you take the time to familiarize yourself with these details. One of the most important aspects to keep in mind is your vehicle’s recommended tire size.
Determining what tire size you need is pretty simple as long as you know what to look for and what those numbers represent. This article will review all the information you need about car tire sizes and help you understand how they apply when choosing a new set of tires.
285 65r18 vs 33×12 50r18 Table
285 65r18 | 33x12 50r18 |
Overall Diameter 32.59 inches | Overall Diameter 33.02 inches |
Width 11.22 inches | Width 12.52 inche |
Sidewall Height 7.29 inches | Sidewall Height 7.51 inches |
Radial Tire (A Radial-Ply Tire) | Radial Tire (A Radial-Ply Tire) |
Rim Size 18 inches | Rim Size 18 inches |
Circumference 102.37 inches | Circumference 103 inches |
Revs Per Mile 618 | Revs Per Mile 610 |
What Does 33×12 50r18 Tire Mean?
The “33” in the 33×12 50r18 tire size refers to the tire’s height in inches. The “12.50” in the 33×12 50r18 tire size indicates the tire’s section width, which is also in inches.
The letter “r” in 33×12 50r18 stands for “radial,” which is the type of tire. The “18” in the 33×12 50r18 tire size is the diameter of the wheel in inches that this tire size can fit. Now that we know what all the numbers and letters in the 33×12 50r18 tire size mean, let’s move on to the comparison.
Tire Diameter
The height of the tire tells us the tire’s diameter. The 285 65r18 has a diameter of 32.59 inches, and the 33×12 50r18 has a diameter of 33 inches. The 33×12 50r18 is slightly taller than the 285 65r18, which means it can roll over obstacles more easily.
The difference between those two tire sizes is 0.41 inches or 1.3%. The taller tire will also give you a smoother ride because it can absorb bumps better.
Section Width
Another important number to look at when you are comparing tires is the section width. The section width is the distance from one side of the tire to the other. The section width of the 285 65r18 is 11.22 inches, and the section width of the 33×12 50r18 is 12.52 inches.
The wider tire will give you more stability while driving and make your car feel more planted on the road. The wider tire will also give you better traction in the mud and snow. The difference between the two tire sizes is 1.3 inches or 11.6%.
Circumference
The circumference is next to look at when you compare tires. The circumference is the distance around the tire. The circumference of the 285 65r18 is 102.37 inches, and the circumference of the 33×12 50r18 is 103.75 inches.
The difference in circumference between the two tires is 1.37 inches or 1.3%. The taller tire will have a slightly smaller circumference, meaning it will take fewer revolutions for the taller tire to go one mile. That can be beneficial if you do a lot of highway driving and want to save some fuel.
Revolutions Per Mile
Now that we have looked at the diameter, section width, and circumference of the two tires, let’s look at the number of revolutions per mile. The number of revolutions per mile is how many times the tire has to go around to travel one mile.
The 285 65r18 has revolutions per mile of 618, and the 33×12 50r18 has revolutions per mile of 610. The difference between the two is ten revolutions per mile or 1.3%. The taller tire will take slightly more revolutions to travel one mile, but the difference is very small.
Sidewall Height
One of the most important things to consider when comparing tires is the sidewall height. The sidewall height is the distance from the rim’s edge to the tire’s tread.
The sidewall height of the 285 65r18 is 7.29 inches, and the sidewall height of the 33×12 50r18 is 7.51 inches. The difference between the two tire sizes is 0.22 inches or 3%.
Wheel Size
The last thing to look at when comparing tires is the wheel size. The wheel size is the diameter of the wheel that the tire can fit. The wheel size of the 285 65r18 is 18 inches, and the wheel size of the 33×12 50r18 is also 18 inches. The difference between the two tire sizes is 0 inches.
Construction Type
The construction type of a tire is how the plies are arranged in the tire. The 285 65r18 is a radial tire, and the 33×12 50r18 is also a radial tire. Both tires have the same type of tire construction.
Radial tires are the most common type of tire on the market. They are characterized by having the plies arranged radially in the tire. This gives the radial tire a more flexible sidewall which helps the tire conform to the road better.
Our Observation
The main difference between 285 65r18 and 33×12 50r18 tire sizes is in the section width. The 33×12 50r18 tire size is 1.3 inches or 11.6% wider than the 285 65r18 tire size. The wider tire will give you more stability while driving and make your car feel more planted on the road. The wider tire will also give you better traction in the mud and snow.
Conclusion
If you are looking for a tire that can handle off-road driving, then the 33×12 50r18 is a better option. If you are looking for a better tire for on-road driving, then the 285 65r18 is a better option. I hope this article helped you to decide which tire size is better for you. If you have any questions, please leave a comment below, and I will be happy to answer them. Thanks for reading!
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