155/65R15 Tire Size in Inches and Millimeters

155/65R15 tires have a diameter of 23" (583 mm), a tread width of 6.1" (155 mm), and a wheel diameter of 15" (381 mm).The sidewall of the tire is 4" (101 mm), and the tire's circumference is 72.2" (1830.6 mm). This means a 155/65R15 tire will make make 878 revolutions per mile, or 546 revolutions per kilometer.

155/65R15 Tire Front
155/65R15 Tire Side
Tire Circumference
878 Revs/Mile
Diameter23"583 mm
Width6.1"155 mm
Wheel15"381 mm
Sidewall4"101 mm
Circum72.2"1830.6 mm
Revolutions878 per mile546 per km

What Does 155/65R15 Mean?

The tire size 155/65R15 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 155: This number represents the width of the tire in millimeters. In this case, the tire is 155 millimeters wide.
  • 65: 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 65% 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.

155/65R15 tire size meaning

How To Convert 155/65R15 Into Inches

The 155/65R15 conversion is fairly simple. The first number in the tire size, 155, represents the width of the tire in millimeters. To convert this to inches, we divide 155 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 6.1 inches.

The second number in the tire size, 65, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 6.1 by 0.65, which gives us approximately 4 inches.

Finally, the last number in the tire size, 15, represents the diameter of the wheel rim in inches. Therefore, the tire size 155/65R15 can be expressed in inches as roughly 6.1 inches wide, 4 inches tall, and designed to fit a 15-inch wheel rim.

Frequently Asked Questions About 155/65R15 Tires

How tall is a 155/65R15 tire?

A 155/65R15 tire has an approximate height, also known as the overall diameter, of 23 inches (583 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 155/65R15 tire?

A 155/65R15 tire has a width of approximately 6.1 inches (155 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “155”. 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 155/65R15 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.

115/70R1622.4"568 mm16 mm
125/70R1622.9"582 mm16 mm
125/80R1522.9"581 mm15 mm
135/60R1622.4"568 mm16 mm
135/70R1522.5"571 mm15 mm
135/70R1623.5"596 mm16 mm
135/80R1422.5"572 mm14 mm
135/80R1523.5"597 mm15 mm
135/90R1423.6"600 mm14 mm
145/65R1522.4"569 mm15 mm
145/80R1423.1"588 mm14 mm
155/60R1522.3"567 mm15 mm
155/65R1523"583 mm15 mm
155/70R1422.6"574 mm14 mm
155/70R1523.6"599 mm15 mm
155/80R1322.8"578 mm13 mm
165/40R1823.2"589 mm18 mm
165/45R1722.8"580 mm17 mm
165/50R1622.5"572 mm16 mm
165/60R1522.8"579 mm15 mm
165/65R1422.4"570 mm14 mm
165/65R1523.4"595 mm15 mm
165/70R1423.1"588 mm14 mm
165/75R1322.8"578 mm13 mm
165/80R1323.4"594 mm13 mm
175/50R1622.9"582 mm16 mm
175/55R1522.6"573 mm15 mm
175/55R1623.5"598 mm16 mm
175/60R1422.3"566 mm14 mm
175/60R1523.3"591 mm15 mm
175/65R1423"584 mm14 mm
175/70R1322.7"576 mm13 mm
185/50R1522.3"567 mm15 mm
185/50R1623.3"592 mm16 mm
185/55R1523"585 mm15 mm
185/60R1422.8"578 mm14 mm
185/65R1322.4"570 mm13 mm
185/65R1423.5"596 mm14 mm
185/70R1323.2"590 mm13 mm
195/35R1823.3"593 mm18 mm
195/40R1723.1"588 mm17 mm
195/45R1622.9"582 mm16 mm
195/50R1522.7"577 mm15 mm
195/55R1422.4"570 mm14 mm
195/55R1523.4"595 mm15 mm
195/60R1423.2"590 mm14 mm
195/65R1323"584 mm13 mm
205/40R1622.4"570 mm16 mm
205/40R1723.5"596 mm17 mm
205/45R1623.2"590 mm16 mm
205/50R1523.1"587 mm15 mm
205/55R1422.9"582 mm14 mm
205/60R1322.7"576 mm13 mm
215/35R1722.9"582 mm17 mm
215/40R1622.8"578 mm16 mm
215/45R1522.6"575 mm15 mm
215/45R1623.6"600 mm16 mm
215/50R1523.5"597 mm15 mm
215/60R1323.1"588 mm13 mm
225/30R1823.3"593 mm18 mm
225/35R1723.2"590 mm17 mm
225/40R1623.1"586 mm16 mm
225/45R1523"583 mm15 mm
225/50R1422.9"582 mm14 mm
235/30R1823.6"599 mm18 mm
235/45R1523.3"593 mm15 mm
235/50R1322.3"566 mm13 mm
245/35R1622.8"578 mm16 mm
245/40R1522.7"577 mm15 mm
245/50R1322.7"576 mm13 mm
255/35R1623"584 mm16 mm
275/35R1522.6"573 mm15 mm
295/35R1523.1"587 mm15 mm