305/70r18 vs 275/70r18 Tire Size
When it comes to tires, there are many different options to choose from. And if you’re like most people, you probably don’t know the first thing about them. Do you go for a smaller size to save on gas, or do you go for a bigger size for better handling?
If you’re stuck between two sizes, which one should you choose? This blog post will compare 305 70r18 and 275 70r18 tire sizes and help you decide which one is better for you!
305 70r18 vs 275 70r18 Table
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What Does 275 70r18 Tire Mean?
The 275 70r18 tire size is actually pretty simple to understand. The first number, “275,” indicates the Tire’s width in millimeters. The second number, “70,” tells you the sidewall height, or how tall the side of the Tire is, as a percentage of the width.
And finally, the “r18” indicates that the Tire is a radial tire, and the diameter of the wheel is 18 inches. Now that we know what the numbers mean let’s look at how they compare!
Tire Diameter
One of the first things you’ll notice is that the 305 70r18 tire is more significant than the 275 70r18. The diameter of the 305 70r18 tire size is about 34.81 inches, while the 275 70r18 has a diameter of approximately 33.16 inches. The difference in the diameter of those tires is 1.65 inches or 5%.
Generally speaking, a bigger tire will give you a smoother ride because there’s more contact with the ground. There will also be less chance of hydroplaning because water is more challenging to get under a wider tire. On the other hand, a bigger tire will weigh more and cost more.
Section Width
The section width of a tire is the width from one sidewall to the other. The 305 70r18 has a width of 12.01 inches, while the 275 70r18 has a width of 10.83 inches. That’s a difference of 1.18 inches or about 10.9%.
A wider tire will give you better traction because there’s more contact with the ground. Wider tires also tend to be more stable, which is important when going fast around corners.
Circumference
The distance around the outside of a tire is known as its circumference. The 305 70r18 has a circumference of 109.36 inches, while the 275 70r18 has a circumference of 104.17 inches. That’s a difference of about 5.19 inches or 5%.
The circumference of a tire is important because it determines how far your car will travel in one revolution. A bigger tire will travel further than a smaller tire, so if you want to go faster, consider getting a bigger one.
Revolutions Per Mile
The number of revolutions per mile (RPM) is an excellent way to compare two tires of different sizes. The 305 70r18 has an RPM of about 579, while the 275 70r18 has an RPM of about 608. That means the difference between the two is approximately 29 miles or 4.8%.
Sidewall Height
The sidewall height is the second number in the tire size. The 305 70r18 has a sidewall height of 8.41 inches, while the 275 70r18 has a sidewall height of 7.58 inches. That’s a difference of about 0.83 inches or 10.9%.
A taller sidewall will give you a softer ride because there’s more cushion between the road and the Tire. Taller sidewalls are also better for off-roading because they provide more clearance and are less likely to get punctured.
Wheel Size
Rim size is the last number in the tire size. The 305 70r18 has a rim size of 18 inches, while the 275 70r18 has a rim size of 18 inches. That means the difference between the two is 0 inches or 0%. The wheel size is important because it determines how big the Tire is.
Construction Type
Radial tires are the most common type of Tire, and they’re usually marked with an “R” in size. The 305 70r18 is a radial tire, while the 275 70r18 is also a radial tire. That means they both are radial construction.
Our Observation
The main difference between the 305 70r18 and 275 70r18 tire Sizes is in width. The 305 70r18 is about 12.01 inches wide, while the 275 70r18 is only approximately 10.83 inches wider.
Wider tires will give you better traction because there is more contact with the ground. Wider tires also tend to be more stable, which is essential when going around corners.
Conclusion
If you want a smoother ride, better fuel economy, and less hydroplaning, go with the 305 70r18. If you wish for better traction, stability, and a softer ride, go with the 275 70r18. It all comes down to what you value most in a tire.
Do the research and decide which tire size is best for you and your car. Once you’ve chosen, head to our website, and we’ll help you find the perfect tires for your vehicle. Thanks for reading!
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Meet Caitlin McCormack, a Tire Size Expert and Blogger Passionate About Everything Related to Tires. With Years of Experience in the Tire Industry, Caitlin Has Become an Expert in Tire Sizes and Their Impact on Vehicle Performance.
