165/50R15 In Inches – Tire Size & Wheel Fitment Guide

What tire size is 165/50R15 in Inches?

The 165/50R15 tire has an overall diameter of 21.5 inches, a section width of 6.5 inches, and can be mounted on 15 inches height of rim. The equivalent tire size in the high flotation system is 21.5x6.5R15.

	Inches	Millimeters
Tire Diameter	21.5	546
Section Width	6.5	165
Rim Height	15	381
Sidewall Height	3.2	82.5
Circumference	67.5	1715.3

6.5"

21.5"

67.5"

15"

3.2"

938.2 Revs/Mile

To make it clear, we'll break down each part of the 165/50R15 tire size to know what these numbers represent & how they may affect your tire's performance:

How big is a 165/50R15 tire?

A 165/50R15 tire has a height of 21.5 inches (546 mm). This is the measurement from the bottom to the highest point at the top of a tire through its exact center when inflated and unloaded.

How wide is a 165/50R15 tire?

The 165/50R15 tire has a width of 6.5 inches (165 mm). This is the measurement at its thickest point, the distance between the outer sidewall and the inner sidewall’s widest point, also called as tread width or section width.

You can put a slightly narrower or wider tire on a rim as long as it falls within the manufacturer's recommended tire width range.

165/50R15 sidewall height

The 165/50R15 has a sidewall height of 3.2 inches (82.5 mm). It’s measured from the rim to the outer edge of the tire's tread, expressed as a percentage of tire width.

What size rim do I need for 165/50R15 tire?

You can mount the 165/50R15 tire on a rim with a height of 15 inches.

Putting very narrow tires on wide rims or vice versa can result in reduced performance of the tire.

165/50R15 circumference

The 165/50R15 tire has a circumference of 67.5 inches (1715.3 mm), This is the measurement of the distance the tire travels in one revolution.

The tire circumference is important for your vehicle's overall performance, affecting its speedometer acceleration, accuracy and fuel efficiency.

165/50R15 Revolutions

The 165/50R15 performs 938.2 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

Compatible Tire Sizes for 165/50R15

As a rule, you can replace the tire within a 3% difference in tire diameter (height) of the OEM tire size. However, it should be considered as a general guideline, not a hard and fast rule. Here is a list of compatible tire sizes for 165/50R15: