165/50R15 Tire Size in Inches and Millimeters

165/50R15 tires have a diameter of 21.5" (547 mm), a tread width of 6.5" (165 mm), and a wheel diameter of 15" (381 mm).The sidewall of the tire is 3.3" (83 mm), and the tire's circumference is 67.5" (1717.6 mm). This means a 165/50R15 tire will make make 939 revolutions per mile, or 582 revolutions per kilometer.

165/50R15 Tire Front
6.5"
21.5"
165/50R15 Tire Side
Tire Circumference
67.5"
15"
3.3"
939 Revs/Mile
SpecInchesMetric
Diameter21.5"547 mm
Width6.5"165 mm
Wheel15"381 mm
Sidewall3.3"83 mm
Circum67.5"1717.6 mm
Revolutions939 per mile582 per km

What Does 165/50R15 Mean?

The tire size 165/50R15 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 165: This number represents the width of the tire in millimeters. In this case, the tire is 165 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.

165/50R15 tire size meaning

How To Convert 165/50R15 Into Inches

The 165/50R15 conversion is fairly simple. The first number in the tire size, 165, represents the width of the tire in millimeters. To convert this to inches, we divide 165 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 6.5 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 6.5 by 0.50, which gives us approximately 3.3 inches.

Finally, the last number in the tire size, 15, represents the diameter of the wheel rim in inches. Therefore, the tire size 165/50R15 can be expressed in inches as roughly 6.5 inches wide, 3.3 inches tall, and designed to fit a 15-inch wheel rim.

Frequently Asked Questions About 165/50R15 Tires

How tall is a 165/50R15 tire?

A 165/50R15 tire has an approximate height, also known as the overall diameter, of 21.5 inches (547 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 165/50R15 tire?

A 165/50R15 tire has a width of approximately 6.5 inches (165 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “165”. 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 165/50R15 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
125/70R1420.9"532 mm14 mm
125/70R1521.9"557 mm15 mm
135/80R1321.5"546 mm13 mm
145/65R1421.4"544 mm14 mm
145/70R1321"534 mm13 mm
145/80R1221.1"537 mm12 mm
145/80R1322.1"562 mm13 mm
155/65R1320.9"532 mm13 mm
155/65R1422"558 mm14 mm
155/70R1321.6"548 mm13 mm
155/80R1221.8"553 mm12 mm
165/40R1621.2"538 mm16 mm
165/45R1621.8"554 mm16 mm
165/50R1521.5"547 mm15 mm
165/55R1421.2"538 mm14 mm
165/55R1522.2"563 mm15 mm
165/60R1421.8"554 mm14 mm
165/65R1321.4"544 mm13 mm
165/70R1221.1"537 mm12 mm
165/70R1322.1"562 mm13 mm
175/50R1420.9"532 mm14 mm
175/50R1521.9"557 mm15 mm
175/60R1321.3"540 mm13 mm
175/65R1322"558 mm13 mm
185/45R1521.5"547 mm15 mm
185/50R1421.3"542 mm14 mm
185/55R1321"534 mm13 mm
185/55R1422"560 mm14 mm
185/60R1321.7"552 mm13 mm
195/40R1622.1"562 mm16 mm
195/45R1420.9"532 mm14 mm
195/45R1521.9"557 mm15 mm
195/55R1321.4"544 mm13 mm
205/45R1421.3"540 mm14 mm
205/50R1321.1"536 mm13 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
225/40R1421.1"536 mm14 mm
225/45R1320.9"532 mm13 mm
225/45R1422"558 mm14 mm
225/50R1321.9"556 mm13 mm
245/35R1521.8"553 mm15 mm
255/35R1421"534 mm14 mm
255/40R1321"534 mm13 mm