# 275/65 R18

## What size is 275/65 R18?

275/65 R18 has an overall diameter of about 32.07 in, a section width of 10.83 in and a sidewall height of 7.04 in. It turns roughly 629 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.

## Specification

| Specification | |
|---|---|
| Overall diameter | 32.07 in |
| Section width | 10.83 in |
| Sidewall height | 7.04 in |
| Circumference | 100.77 in |
| Revolutions | 391 /km · 629 /mi |

## In-tolerance sizes

| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| [285/45 R22](https://tirefitlab.com/285-45-r22.md) | +0.1% | +0.1% | ✓ OK |
| [275/55 R20](https://tirefitlab.com/275-55-r20.md) | -0.5% | -0.5% | ✓ OK |
| [275/45 R22](https://tirefitlab.com/275-45-r22.md) | -1.0% | -1.0% | ✓ OK |
| [265/70 R17](https://tirefitlab.com/265-70-r17.md) | -1.5% | -1.5% | ✓ OK |
| [305/40 R22](https://tirefitlab.com/305-40-r22.md) | -1.5% | -1.5% | ✓ OK |
| [265/65 R18](https://tirefitlab.com/265-65-r18.md) | -1.6% | -1.6% | ✓ OK |
| [285/65 R18](https://tirefitlab.com/285-65-r18.md) | +1.6% | +1.6% | ✓ OK |
| [285/60 R18](https://tirefitlab.com/285-60-r18.md) | -1.9% | -1.9% | ✓ OK |
| [305/45 R22](https://tirefitlab.com/305-45-r22.md) | +2.3% | +2.3% | ✓ OK |
| [285/50 R20](https://tirefitlab.com/285-50-r20.md) | -2.7% | -2.7% | ✓ OK |
| [33x12.50 R15](https://tirefitlab.com/33x12.50-r15.md) | +2.9% | +2.9% | ✓ OK |
| [33x12.50 R16](https://tirefitlab.com/33x12.50-r16.md) | +2.9% | +2.9% | ✓ OK |

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Methodology: https://tirefitlab.com/methodology/ · Tire size calculator: https://tirefitlab.com/275-65-r18/

> Geometry is computed in canonical millimetres and is deterministic across the site. Always verify physical clearance before fitting.