275/65R18 tire size
275/65R18 (listed here under light-truck & off-road sizes) is 32.07 in tall and 10.83 in wide, with a 7.04 in sidewall, and is made for an 18-inch wheel.
| Measurement | Imperial | Metric |
|---|---|---|
| Overall diameter (height) | 32.07 in | 815 mm |
| Section width | 10.83 in | 275 mm |
| Sidewall height | 7.04 in | 179 mm |
| Rim (wheel) diameter | 18 in | 457 mm |
| Aspect ratio | 65% | — |
| Circumference | 100.8 in | 2559 mm |
| Revolutions | 629 per mile | 391 per km |
Compare 275/65R18 with any other size →
275/65R18 in inches
275/65R18 is 32.07 × 10.83 in on an 18-inch rim — roughly 32x11.00R18 in inch (flotation) terms.
Other metric sizes on an 18-inch rim within ±3% of its diameter:
| Size | Diameter | Width | vs original |
|---|---|---|---|
| 255/70R18 | 32.06 in | 10.04 in | −0.06% |
| 295/60R18 | 31.94 in | 11.61 in | −0.43% |
| 235/75R18 | 31.88 in | 9.25 in | −0.61% |
| 305/60R18 | 32.41 in | 12.01 in | +1.04% |
| 245/75R18 | 32.47 in | 9.65 in | +1.23% |
| 265/65R18 | 31.56 in | 10.43 in | −1.60% |
| 285/65R18 | 32.59 in | 11.22 in | +1.60% |
| 315/55R18 | 31.64 in | 12.40 in | −1.35% |
| 265/70R18 | 32.61 in | 10.43 in | +1.66% |
| 285/60R18 | 31.46 in | 11.22 in | −1.90% |
Computed combinations of standard widths and aspect ratios; not every size is manufactured. A similar diameter does not mean a size fits or is approved for your vehicle.
Sizes on other wheels with nearly the same height
From our size pages, these stay within ±3% of 275/65R18's diameter:
Height difference to other sizes on this site
| Other size | Height difference | True speed at 60 mph indicated | Diameter vs ±3% rule of thumb |
|---|---|---|---|
| 265/75R16 | −0.43 in (−1.3%) | 59.2 mph | inside |
| 265/70R17 | −0.47 in (−1.5%) | 59.1 mph | inside |
| 265/65R18 | −0.51 in (−1.6%) | 59.0 mph | inside |
| 285/70R17 | +0.63 in (+2.0%) | 61.2 mph | inside |
| 285/75R16 | +0.76 in (+2.4%) | 61.4 mph | inside |
| 275/60R20 | +0.92 in (+2.9%) | 61.7 mph | inside |
Speeds assume the speedometer was accurate on 275/65R18.
Geometry only: this does not confirm that a size fits, is approved for or is safe on a particular vehicle. Wheel width and offset, suspension, clearances, load index, speed rating, the vehicle maker's specification and local regulations all apply — check with your owner's manual and a qualified tire professional.
Detailed comparisons
Frequently asked questions
How tall is a 275/65R18 tire?
32.07 inches (815 mm) in nominal overall diameter. Measured height varies slightly by brand and model and decreases as the tread wears.
What is 275/65R18 in inches?
About 32.1 × 10.8 in on an 18-inch wheel, which in inch (flotation) notation is roughly 32x11.00R18.
How tall is 275/65R18 in whole inches?
32.07 in, which rounds to 32 in. Tire sellers and owners sometimes round sizes differently, and measured heights vary by model.
How many revolutions per mile does a 275/65R18 make?
About 629 revolutions per mile (391 per km) from its nominal circumference of 100.8 in. Manufacturer-measured values are slightly higher because the loaded tire deflects.
Nominal dimensions computed from the size code; see methodology. Always confirm load index, speed rating and fitment for your vehicle.
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