Home › 18" tire sizes › 265/65R18
265/65R18 tire size in inches
265/65R18 is 31.56" tall and 10.43" wide, and fits a 18" rim. In flotation (inch) sizing that is roughly 31.6x10.4R18.
265/65R18 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 31.56" | 802 mm |
| Section width | 10.43" | 265 mm |
| Sidewall height | 6.78" | 172.2 mm |
| Rim diameter | 18" | 457.2 mm |
| Circumference | 99.2" | 2519 mm |
| Revolutions per mile | 639 | |
| Aspect ratio | 65% (sidewall is 65% of the width) | |
Drawn to scale
Among the 122 sizes for 18" wheels on this site, 265/65R18 is #68 by height (shortest: 245/35R18, tallest: 340/80R18).
What people compare 265/65R18 with
Real comparisons drivers search for, worked out against 265/65R18:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/65R18 | +0.51" (+1.62%) | +0.40" | +0.26" | 59 mph |
| 275/70R18 | +1.60" (+5.07%) | +0.40" | +0.80" | 57.1 mph |
| 265/60R18 | -1.04" (-3.3%) | 0.00" | -0.52" | 62 mph |
| 265/70R18 | +1.05" (+3.33%) | 0.00" | +0.52" | 58.1 mph |
| 285/65R18 | +1.03" (+3.26%) | +0.79" | +0.51" | 58.1 mph |
| 265/70R17 | +0.05" (+0.16%) | 0.00" | +0.52" | 59.9 mph |
| 255/70R18 | +0.50" (+1.58%) | -0.39" | +0.25" | 59.1 mph |
| 275/55R20 | +0.35" (+1.11%) | +0.40" | -0.83" | 59.3 mph |
How the 265/65R18 numbers are worked out
The size code reads as 265 mm section width, 65% aspect ratio, R for radial construction and 18-inch wheel.
- Sidewall = 265 × 65% = 172.2 mm = 6.78"
- Diameter = 18" + 2 × 6.78" = 31.56"
- Circumference = π × 31.56" = 99.2"
- Revs per mile = 63,360" ÷ 99.2" = 639
Sizes that can replace 265/65R18 on a 18" wheel
Within 3% of 31.56". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 245/70R18 | 31.50" | 9.65" | -0.19% | 60.1 mph |
| 285/60R18 | 31.46" | 11.22" | -0.32% | 60.2 mph |
| 270/65R18 | 31.82" | 10.63" | +0.82% | 59.5 mph |
| 235/75R18 | 31.88" | 9.25" | +1.01% | 59.4 mph |
| 305/55R18 | 31.21" | 12.01" | -1.11% | 60.7 mph |
| 295/60R18 | 31.94" | 11.61" | +1.2% | 59.3 mph |
| 255/70R18 | 32.06" | 10.04" | +1.58% | 59.1 mph |
| 275/65R18 | 32.07" | 10.83" | +1.62% | 59 mph |
| 255/65R18 | 31.05" | 10.04" | -1.62% | 61 mph |
| 325/55R18 | 32.07" | 12.80" | +1.62% | 59 mph |
| 275/60R18 | 30.99" | 10.83" | -1.81% | 61.1 mph |
| 235/70R18 | 30.95" | 9.25" | -1.93% | 61.2 mph |
One size wider or narrower
- Narrower: 255/65R18 — 10.04" wide, 31.05" tall
- Wider: 275/65R18 — 10.83" wide, 32.07" tall
Same height on a different wheel size
- 265/80R15 15" (+0.41%)
- 245/85R15 15" (-0.51%)
- 305/70R15 15" (+0.79%)
- 285/75R15 15" (+0.86%)
- 295/70R15 15" (-0.95%)
- 275/75R15 15" (-1.01%)
- 255/80R15 15" (-1.58%)
- 255/85R15 15" (+1.62%)
- 305/65R16 16" (+0.16%)
- 265/75R16 16" (+0.29%)
Questions about 265/65R18
How tall is a 265/65R18 tire in inches?
A 265/65R18 tire is 31.56 inches (802 mm) tall: the 18-inch rim plus two sidewalls of 6.78 inches each.
Is 265/65R18 a 32 inch tire?
Yes. At 31.56 inches tall it is commonly called a 32-inch tire.
How many revolutions per mile does a 265/65R18 make?
About 639 revolutions per mile, based on a calculated circumference of 99.2 inches.
What size can replace 265/65R18?
245/70R18 is the closest match on a 18" rim (-0.19% height). Check load index, speed rating and clearance first.
Compare 265/65R18 against any other size with the tire size calculator.