# 285/50 R20

## What size is 285/50 R20?

285/50 R20 has an overall diameter of about 31.22 in, a section width of 11.22 in and a sidewall height of 5.61 in. It turns roughly 646 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.

## Specification

| Specification | |
|---|---|
| Overall diameter | 31.22 in |
| Section width | 11.22 in |
| Sidewall height | 5.61 in |
| Circumference | 98.08 in |
| Revolutions | 401 /km · 646 /mi |

## In-tolerance sizes

| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| [31x10.50 R15](https://tirefitlab.com/31x10.50-r15.md) | -0.7% | -0.7% | ✓ OK |
| [31x10.50 R16](https://tirefitlab.com/31x10.50-r16.md) | -0.7% | -0.7% | ✓ OK |
| [285/60 R18](https://tirefitlab.com/285-60-r18.md) | +0.8% | +0.8% | ✓ OK |
| [285/40 R22](https://tirefitlab.com/285-40-r22.md) | -0.8% | -0.8% | ✓ OK |
| [275/55 R19](https://tirefitlab.com/275-55-r19.md) | -1.0% | -1.0% | ✓ OK |
| [265/65 R18](https://tirefitlab.com/265-65-r18.md) | +1.1% | +1.1% | ✓ OK |
| [265/70 R17](https://tirefitlab.com/265-70-r17.md) | +1.2% | +1.2% | ✓ OK |
| [305/40 R22](https://tirefitlab.com/305-40-r22.md) | +1.2% | +1.2% | ✓ OK |
| [275/45 R21](https://tirefitlab.com/275-45-r21.md) | -1.5% | -1.5% | ✓ OK |
| [275/45 R22](https://tirefitlab.com/275-45-r22.md) | +1.7% | +1.7% | ✓ OK |
| [265/70 R16](https://tirefitlab.com/265-70-r16.md) | -2.0% | -2.0% | ✓ OK |
| [265/65 R17](https://tirefitlab.com/265-65-r17.md) | -2.1% | -2.1% | ✓ OK |

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Methodology: https://tirefitlab.com/methodology/ · Tire size calculator: https://tirefitlab.com/285-50-r20/

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