255/85R16 Tire Size in Inches and Millimeters

255/85R16 tires have a diameter of 33.1" (840 mm), a tread width of 10" (255 mm), and a wheel diameter of 16" (406.4 mm).The sidewall of the tire is 8.5" (217 mm), and the tire's circumference is 103.9" (2637.6 mm). This means a 255/85R16 tire will make make 610 revolutions per mile, or 379 revolutions per kilometer.

255/85R16 Tire Front
10"
33.1"
255/85R16 Tire Side
Tire Circumference
103.9"
16"
8.5"
610 Revs/Mile
SpecInchesMetric
Diameter33.1"840 mm
Width10"255 mm
Wheel16"406.4 mm
Sidewall8.5"217 mm
Circum103.9"2637.6 mm
Revolutions610 per mile379 per km

What Does 255/85R16 Mean?

The tire size 255/85R16 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 255: This number represents the width of the tire in millimeters. In this case, the tire is 255 millimeters wide.
  • 85: 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 85% 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.
  • 16: 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 16-inch wheel.

255/85R16 tire size meaning

How To Convert 255/85R16 Into Inches

The 255/85R16 conversion is fairly simple. The first number in the tire size, 255, represents the width of the tire in millimeters. To convert this to inches, we divide 255 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 10 inches.

The second number in the tire size, 85, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 10 by 0.85, which gives us approximately 8.5 inches.

Finally, the last number in the tire size, 16, represents the diameter of the wheel rim in inches. Therefore, the tire size 255/85R16 can be expressed in inches as roughly 10 inches wide, 8.5 inches tall, and designed to fit a 16-inch wheel rim.

Cooper Discoverer S/T Maxx All-Season LT255/85R16 123/120Q Tire
Cooper Discoverer S/T Maxx All-Season LT255/85R16 123/120Q Tire
All-Season Commercial Traction Tire; Tread design helps to prevent stone retention; Armor Tek3 construction for added tire durability
$322.41
BFGoodrich Mud-Terrain T/A KM3 Radial Tire-LT255/85R16/E 123/120Q 123Q
BFGoodrich Mud-Terrain T/A KM3 Radial Tire-LT255/85R16/E 123/120Q 123Q
5% Better Mud Traction[1]; 8% Better Rock Traction[2]; 27% Tougher Sidewalls[3]; Fit type: Vehicle Specific
$333.99
Sale
LT255/85R16 E/10 123Q FALKEN WILDPEAK MT01 BW
LT255/85R16 E/10 123Q FALKEN WILDPEAK MT01 BW
All-season tread; Black sidewall
$239.26

Frequently Asked Questions About 255/85R16 Tires

How tall is a 255/85R16 tire?

A 255/85R16 tire has an approximate height, also known as the overall diameter, of 33.1 inches (840 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 255/85R16 tire?

A 255/85R16 tire has a width of approximately 10 inches (255 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “255”. 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 255/85R16 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
235/85R1732.8"832 mm17 mm
255/65R1932.1"815 mm19 mm
255/70R1832.1"815 mm18 mm
255/80R1733.1"840 mm17 mm
255/85R1633.1"840 mm16 mm
265/50R2232.5"825 mm22 mm
265/60R2032.5"826 mm20 mm
265/70R1832.6"829 mm18 mm
265/80R1632.7"830 mm16 mm
275/25R2833.4"849 mm28 mm
275/50R2232.9"835 mm22 mm
275/55R2233.9"861 mm22 mm
275/60R2033"838 mm20 mm
275/65R1832.1"815 mm18 mm
275/70R1732.2"818 mm17 mm
275/70R1833.2"843 mm18 mm
285/40R2433"838 mm24 mm
285/45R2232.1"815 mm22 mm
285/50R2233.3"845 mm22 mm
285/55R2032.4"822 mm20 mm
285/60R2033.5"850 mm20 mm
285/65R1832.6"827 mm18 mm
285/70R1732.8"832 mm17 mm
285/70R1833.7"857 mm18 mm
285/75R1632.8"834 mm16 mm
285/75R1733.9"860 mm17 mm
295/25R2833.8"859 mm28 mm
295/30R2633"838 mm26 mm
295/35R2432.1"816 mm24 mm
295/40R2433.3"846 mm24 mm
295/45R2232.5"825 mm22 mm
295/50R2233.7"855 mm22 mm
295/55R2032.8"832 mm20 mm
295/60R2033.9"862 mm20 mm
295/65R1833.1"841 mm18 mm
295/70R1733.3"846 mm17 mm
295/75R1633.4"848 mm16 mm
305/30R2633.2"844 mm26 mm
305/35R2432.4"824 mm24 mm
305/40R2332.6"828 mm23 mm
305/40R2433.6"854 mm24 mm
305/45R2232.8"833 mm22 mm
305/50R2234.1"865 mm22 mm
305/55R2033.2"844 mm20 mm
305/60R1832.4"823 mm18 mm
305/65R1732.6"828 mm17 mm
305/65R1833.6"853 mm18 mm
305/70R1632.8"834 mm16 mm
305/70R1733.9"860 mm17 mm
305/75R1634"864 mm16 mm
315/35R2432.7"830 mm24 mm
315/45R2132.2"817 mm21 mm
315/45R2233.2"843 mm22 mm
315/50R2032.4"824 mm20 mm
315/70R1532.4"823 mm15 mm
315/70R1633.4"848 mm16 mm
325/40R2232.2"819 mm22 mm
325/45R2233.5"851 mm22 mm
325/50R2032.8"834 mm20 mm
325/60R1833.3"847 mm18 mm
355/40R2233.2"843 mm22 mm
355/50R2034"864 mm20 mm
375/45R2033.3"846 mm20 mm
375/50R1832.8"833 mm18 mm
375/55R1632.2"818 mm16 mm