175/50R15 Tire Size in Inches and Millimeters

175/50R15 tires have a diameter of 21.9" (557 mm), a tread width of 6.9" (175 mm), and a wheel diameter of 15" (381 mm).The sidewall of the tire is 3.5" (88 mm), and the tire's circumference is 68.8" (1749 mm). This means a 175/50R15 tire will make make 921 revolutions per mile, or 572 revolutions per kilometer.

175/50R15 Tire Front
6.9"
21.9"
175/50R15 Tire Side
Tire Circumference
68.8"
15"
3.5"
921 Revs/Mile
SpecInchesMetric
Diameter21.9"557 mm
Width6.9"175 mm
Wheel15"381 mm
Sidewall3.5"88 mm
Circum68.8"1749 mm
Revolutions921 per mile572 per km

What Does 175/50R15 Mean?

The tire size 175/50R15 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 175: This number represents the width of the tire in millimeters. In this case, the tire is 175 millimeters wide.
  • 50: This number represents the aspect ratio of the tire, which is the height of the tire's sidewall as a percentage of its width. In this case, the sidewall height is 50% of the tire's width.
  • R: This letter indicates the tire's construction type. “R” stands for radial construction, which is the most common type of tire construction today.
  • 15: This number represents the diameter of the wheel that the tire is designed to fit on, in inches. In this case, the tire is designed to fit on a 15-inch wheel.

175/50R15 tire size meaning

How To Convert 175/50R15 Into Inches

The 175/50R15 conversion is fairly simple. The first number in the tire size, 175, represents the width of the tire in millimeters. To convert this to inches, we divide 175 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 6.9 inches.

The second number in the tire size, 50, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 6.9 by 0.50, which gives us approximately 3.5 inches.

Finally, the last number in the tire size, 15, represents the diameter of the wheel rim in inches. Therefore, the tire size 175/50R15 can be expressed in inches as roughly 6.9 inches wide, 3.5 inches tall, and designed to fit a 15-inch wheel rim.

Frequently Asked Questions About 175/50R15 Tires

How tall is a 175/50R15 tire?

A 175/50R15 tire has an approximate height, also known as the overall diameter, of 21.9 inches (557 mm). This height can vary slightly depending on the brand and model of the tire, as well as the amount of air pressure in the tire.

How wide is a 175/50R15 tire?

A 175/50R15 tire has a width of approximately 6.9 inches (175 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “175”. It’s important to note that the actual width of the tire may vary slightly depending on the brand and model of the tire, and the width may also be affected by the amount of air pressure in the tire.

Alternate 175/50R15 Replacement Tire Sizes

Upsizing your wheels or tires? Replacement tires must be within 3% of the diametor of the original tire. The following sizes fall within that range - click on any size to see detailed info about that tire and wheel combination.

SizeDiameterWidthWheel
115/70R1521.4"543 mm15 mm
115/70R1622.4"568 mm16 mm
125/70R1521.9"557 mm15 mm
135/60R1622.4"568 mm16 mm
135/70R1522.5"571 mm15 mm
135/80R1321.5"546 mm13 mm
135/80R1422.5"572 mm14 mm
145/65R1421.4"544 mm14 mm
145/65R1522.4"569 mm15 mm
145/80R1322.1"562 mm13 mm
155/60R1522.3"567 mm15 mm
155/65R1422"558 mm14 mm
155/70R1321.6"548 mm13 mm
155/80R1221.8"553 mm12 mm
165/40R1722.2"564 mm17 mm
165/45R1621.8"554 mm16 mm
165/50R1521.5"547 mm15 mm
165/50R1622.5"572 mm16 mm
165/55R1522.2"563 mm15 mm
165/60R1421.8"554 mm14 mm
165/65R1321.4"544 mm13 mm
165/65R1422.4"570 mm14 mm
165/70R1322.1"562 mm13 mm
175/50R1521.9"557 mm15 mm
175/55R1522.6"573 mm15 mm
175/60R1422.3"566 mm14 mm
175/65R1322"558 mm13 mm
185/45R1521.5"547 mm15 mm
185/50R1421.3"542 mm14 mm
185/50R1522.3"567 mm15 mm
185/55R1422"560 mm14 mm
185/60R1321.7"552 mm13 mm
185/65R1322.4"570 mm13 mm
195/40R1622.1"562 mm16 mm
195/45R1521.9"557 mm15 mm
195/55R1321.4"544 mm13 mm
195/55R1422.4"570 mm14 mm
195/60R1322.2"564 mm13 mm
205/40R1622.4"570 mm16 mm
205/45R1522.2"565 mm15 mm
205/50R1422.1"562 mm14 mm
215/35R1621.9"556 mm16 mm
215/40R1521.8"553 mm15 mm
215/50R1321.5"546 mm13 mm
225/45R1422"558 mm14 mm
225/50R1321.9"556 mm13 mm
235/50R1322.3"566 mm13 mm
245/35R1521.8"553 mm15 mm
275/35R1522.6"573 mm15 mm