215 45r17 vs 215 55r17 Tire Size

Tires come in a variety of sizes, and it can be confusing trying to figure out the difference between them. Two standard sizes are 215 45r17 and 215 55r17. So, what’s the difference? We’ll break down the differences between these two tire sizes so you can decide which one is right for you.

215/45r17 vs 215/55r17 Table

This comparison table will help you to understand the differences between the two sizes at a glance.

215/45r17

215/55r17

Overall Diameter 24.62 inches

Overall Diameter 26.31 inches

Width 8.46 inches 

Width 8.46 inches

Sidewall Height 3.81 inches 

Sidewall Height 4.66 inches 

Radial Tire (A Radial-Ply Tire)

Radial Tire (A Radial-Ply Tire)

Rim Size 17inches

Rim Size 17 inches

Circumference 77.34 inches

Circumference 82.66 inches

Revs Per Mile 819

Revs Per Mile 766

Overall Diameter
The first thing you’ll notice is that the 215 45r17 has a smaller overall diameter than the 215 55r17. This means that the 45 series tire will be shorter and narrower than the 55 series tire. The overall diameter of the 215 45r17 tire size is 24.62 inches, and 26.31 inches for the 215 55r17 tire size.

The smaller size can be advantageous because it will improve your fuel economy and handling. It can also be a good choice if you frequently drive on winding roads or in the city.

Section Width
The section width is the measurement of the tire from sidewall to sidewall. The 215 45r17 has a section width of 215 mm, and the 215 55r17 has a section width of 215 mm. That means both of the tires are the same width.

The section width is important because it affects the grip of the tire. A wider tire will have more surface area in contact with the road, which gives it more traction.

Circumference
The circumference is the distance around the outside of the tire. The 215 45r17 has a circumference of 77.34 inches, and the 215 55r17 has a circumference of 82.66 inches.

The larger circumference of the 215 55r17 can be advantageous because it will give you a smoother ride. The larger tire size will make your car more stable at high speeds.

Revolutions Per Mile
The revolutions per mile (RPM) is a measure of how many times the tire will rotate in one mile. The 215 45r17 has an RPM of 819, and the 215 55r17 has an RPM of 766. The lower RPM of the 215 55r17 can be advantageous because it will reduce the wear and tear on your car.

Sidewall Height
The sidewall height is the distance from the edge of the rim to the top of the tire. The 215 45r17 has a sidewall height of 96.75 mm, and the 215 55r17 has a sidewall height of 118.25 mm. That means the 55 series tire has a taller sidewall.
The taller sidewall of the 215 55r17 can be advantageous because it will give you a smoother ride. The taller sidewall will also provide more protection for the rim of your car.

Wheel Size
The wheel size is the diameter of the wheel that the tire is mounted on. The 215 45r17 can be mounted on a 17-inch wheel, and the 215 55r17 can be mounted on a 17-inch wheel. That means both tires can be used with the same size wheel.

Construction Type
The 215 45r17 is a radial tire, and the 215 55r17 is a radial tire. That means both tires are made with layers of cords that run radially from the bead to the tread. Radial construction is the most common type of tire construction. It is known for its good handling, low noise, and long tread life.

Our Observation
The 215 45r17 is a good choice for those who want a smaller tire size. The smaller size will improve your fuel economy and handling. The 45 series tire is also a good choice if you frequently drive on winding roads or in the city.

The 215 55r17 is a good choice for those who want a larger tire size. The larger size will give you a smoother ride. The 55 series tire is also a good choice if you frequently drive on highways or in the country.

Conclusion
The main difference between 215 45r17 and 215 55r17 tire size is in the sidewall height. The sidewall height of the 215 55r17 tire size is 0.85 inches or 22.2% taller than the 215 45r17 tire size. We hope this tire size comparison has been helpful. Now that you know the differences between the two sizes, you can make a more informed decision about which size is right for your car.

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