265/35R18 Tire Size in Inches and Millimeters

265/35R18 tires have a diameter of 25.3" (643 mm), a tread width of 10.4" (265 mm), and a wheel diameter of 18" (457.2 mm).The sidewall of the tire is 3.7" (93 mm), and the tire's circumference is 79.4" (2019 mm). This means a 265/35R18 tire will make make 798 revolutions per mile, or 495 revolutions per kilometer.

265/35R18 Tire Front
265/35R18 Tire Side
Tire Circumference
798 Revs/Mile
Diameter25.3"643 mm
Width10.4"265 mm
Wheel18"457.2 mm
Sidewall3.7"93 mm
Circum79.4"2019 mm
Revolutions798 per mile495 per km

What Does 265/35R18 Mean?

The tire size 265/35R18 is a common size used on many trucks, SUVs, and other larger vehicles.

Here is what each part of the size designation represents:

  • 265: This number represents the width of the tire in millimeters. In this case, the tire is 265 millimeters wide.
  • 35: 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 35% 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.
  • 18: 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 18-inch wheel.

265/35R18 tire size meaning

How To Convert 265/35R18 Into Inches

The 265/35R18 conversion is fairly simple. The first number in the tire size, 265, represents the width of the tire in millimeters. To convert this to inches, we divide 265 by 25.4 (since there are 25.4 millimeters in an inch). This gives us approximately 10.4 inches.

The second number in the tire size, 35, represents the aspect ratio or the height of the tire as a percentage of its width. To calculate the height in inches, we multiply 10.4 by 0.35, which gives us approximately 3.7 inches.

Finally, the last number in the tire size, 18, represents the diameter of the wheel rim in inches. Therefore, the tire size 265/35R18 can be expressed in inches as roughly 10.4 inches wide, 3.7 inches tall, and designed to fit a 18-inch wheel rim.

Hankook Ventus V12 evo 2 Summer Radial Tire - 265/35R18 Y
Hankook Ventus V12 evo 2 Summer Radial Tire - 265/35R18 Y
Load Index: 04, Speed Symbol: 97
Lexani LXUHP-207 265/35R18
Lexani LXUHP-207 265/35R18
Lateral “V” shaped grooves improve hydroplaning resistance and improve wet grip; Load capacity: 1609 pounds
Kumho Ecsta V730 (265/35R18 XL)
Kumho Ecsta V730 (265/35R18 XL)
Extreme Performance Summer
Pirelli P Zero 265/35R18 97Y XL
Pirelli P Zero 265/35R18 97Y XL
Product Type :Tires; Package Dimensions :26.0" L X26.0" W X11.0" H; Country Of Origin :United States

Frequently Asked Questions About 265/35R18 Tires

How tall is a 265/35R18 tire?

A 265/35R18 tire has an approximate height, also known as the overall diameter, of 25.3 inches (643 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 265/35R18 tire?

A 265/35R18 tire has a width of approximately 10.4 inches (265 millimeters). The width of the tire is the first number in the tire size designation, which in this case is “265”. 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 265/35R18 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.

115/70R1925.4"645 mm19 mm
115/95R1725.6"650 mm17 mm
125/70R1824.9"633 mm18 mm
125/70R1925.9"659 mm19 mm
125/80R1724.9"632 mm17 mm
125/90R1624.9"632 mm16 mm
135/60R1925.4"645 mm19 mm
135/70R1825.5"647 mm18 mm
135/80R1725.5"648 mm17 mm
135/90R1524.6"625 mm15 mm
135/90R1625.6"650 mm16 mm
145/65R1825.4"645 mm18 mm
145/70R1725"636 mm17 mm
145/70R1826"661 mm18 mm
145/80R1625.1"638 mm16 mm
155/60R1825.3"643 mm18 mm
155/70R1725.6"650 mm17 mm
155/80R1524.8"629 mm15 mm
155/80R1625.7"654 mm16 mm
165/80R1525.4"645 mm15 mm
175/55R1724.6"624 mm17 mm
175/70R1524.7"627 mm15 mm
175/75R1525.3"643 mm15 mm
175/80R1425"636 mm14 mm
185/55R1826"661 mm18 mm
185/60R1624.7"628 mm16 mm
185/60R1725.7"654 mm17 mm
185/65R1625.4"646 mm16 mm
185/70R1525.2"641 mm15 mm
185/75R1425"634 mm14 mm
185/80R1324.6"626 mm13 mm
185/80R1425.7"652 mm14 mm
195/50R1724.7"628 mm17 mm
195/55R1725.4"646 mm17 mm
195/60R1625.2"640 mm16 mm
195/65R1525"635 mm15 mm
195/65R1626"660 mm16 mm
195/70R1424.8"630 mm14 mm
195/70R1525.8"655 mm15 mm
195/75R1425.5"648 mm14 mm
205/45R1825.2"641 mm18 mm
205/50R1725.1"638 mm17 mm
205/55R1624.9"632 mm16 mm
205/55R1725.9"658 mm17 mm
205/60R1524.7"627 mm15 mm
205/60R1625.7"652 mm16 mm
205/65R1525.5"647 mm15 mm
205/70R1425.4"644 mm14 mm
215/30R2025.1"638 mm20 mm
215/35R1924.9"633 mm19 mm
215/40R1824.8"629 mm18 mm
215/40R1925.8"655 mm19 mm
215/45R1724.6"626 mm17 mm
215/45R1825.6"651 mm18 mm
215/50R1725.5"648 mm17 mm
215/55R1625.3"642 mm16 mm
215/60R1525.2"639 mm15 mm
215/65R1425"636 mm14 mm
215/65R1526"661 mm15 mm
215/70R1425.9"658 mm14 mm
225/30R2025.4"644 mm20 mm
225/35R1925.2"641 mm19 mm
225/40R1825.1"637 mm18 mm
225/45R1725"634 mm17 mm
225/45R1825.9"659 mm18 mm
225/50R1624.9"632 mm16 mm
225/50R1725.9"658 mm17 mm
225/55R1524.8"629 mm15 mm
225/55R1625.7"654 mm16 mm
225/60R1424.6"626 mm14 mm
225/60R1525.6"651 mm15 mm
235/30R1924.6"625 mm19 mm
235/30R2025.6"650 mm20 mm
235/35R1925.5"647 mm19 mm
235/40R1825.4"645 mm18 mm
235/45R1725.4"644 mm17 mm
235/50R1625.3"642 mm16 mm
235/55R1525.2"639 mm15 mm
235/60R1425.1"638 mm14 mm
245/30R1924.8"631 mm19 mm
245/30R2025.8"656 mm20 mm
245/35R1824.8"629 mm18 mm
245/35R1925.8"655 mm19 mm
245/40R1724.7"628 mm17 mm
245/40R1825.7"653 mm18 mm
245/45R1624.6"626 mm16 mm
245/45R1725.7"652 mm17 mm
245/50R1524.7"627 mm15 mm
245/50R1625.7"652 mm16 mm
245/60R1425.6"650 mm14 mm
255/30R1925.1"637 mm19 mm
255/30R2026.1"662 mm20 mm
255/35R1825"635 mm18 mm
255/35R1926"661 mm19 mm
255/40R1725"636 mm17 mm
255/40R1826"661 mm18 mm
255/45R1726.1"662 mm17 mm
255/50R1626.1"662 mm16 mm
255/55R1425"636 mm14 mm
255/55R1526"661 mm15 mm
255/60R1426.1"662 mm14 mm
265/30R1925.3"643 mm19 mm
265/35R1825.3"643 mm18 mm
265/40R1725.4"644 mm17 mm
265/45R1625.4"644 mm16 mm
265/50R1525.5"647 mm15 mm
275/25R2025.4"646 mm20 mm
275/30R1925.6"649 mm19 mm
275/35R1724.6"624 mm17 mm
275/35R1825.6"649 mm18 mm
275/40R1725.7"652 mm17 mm
275/45R1625.7"654 mm16 mm
275/50R1525.9"657 mm15 mm
285/25R2025.6"650 mm20 mm
285/30R1824.8"629 mm18 mm
285/30R1925.8"655 mm19 mm
285/35R1724.9"632 mm17 mm
285/35R1825.9"657 mm18 mm
285/40R1726"660 mm17 mm
295/25R1924.8"631 mm19 mm
295/25R2025.8"656 mm20 mm
295/30R1825"635 mm18 mm
295/30R1926"661 mm19 mm
295/35R1725.1"638 mm17 mm
305/25R1925"635 mm19 mm
305/25R2026"660 mm20 mm
305/30R1825.2"641 mm18 mm
305/35R1725.4"646 mm17 mm
315/25R1925.2"641 mm19 mm
315/30R1825.5"647 mm18 mm
315/35R1725.7"652 mm17 mm
315/40R1625.9"658 mm16 mm
335/25R1925.6"651 mm19 mm
335/30R1825.9"659 mm18 mm
355/25R1926"661 mm19 mm