# 185/55 R15

## What size is 185/55 R15?

185/55 R15 has an overall diameter of about 23.01 in, a section width of 7.28 in and a sidewall height of 4.01 in. It turns roughly 876 times per mile. Below are the exact figures plus in-tolerance plus/minus sizes you can switch to safely.

## Specification

| Specification | |
|---|---|
| Overall diameter | 23.01 in |
| Section width | 7.28 in |
| Sidewall height | 4.01 in |
| Circumference | 72.29 in |
| Revolutions | 545 /km · 876 /mi |

## In-tolerance sizes

| Size | Diameter | Speedo | Verdict |
|---|---|---|---|
| [175/65 R14](https://tirefitlab.com/175-65-r14.md) | -0.2% | -0.2% | ✓ OK |
| [165/70 R14](https://tirefitlab.com/165-70-r14.md) | +0.4% | +0.4% | ✓ OK |
| [185/60 R14](https://tirefitlab.com/185-60-r14.md) | -1.2% | -1.2% | ✓ OK |
| [195/55 R15](https://tirefitlab.com/195-55-r15.md) | +1.9% | +1.9% | ✓ OK |
| [185/65 R14](https://tirefitlab.com/185-65-r14.md) | +2.0% | +2.0% | ✓ OK |

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Methodology: https://tirefitlab.com/methodology/ · Tire size calculator: https://tirefitlab.com/185-55-r15/

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