# /45 series tire aspect ratio

## What does /45 mean in a tire size?

A /45 aspect ratio means the tire sidewall height is 45% of the section width. For a 205/45R16 tire, the sidewall is 92.25mm tall. Common 45-series sizes span multiple rim diameters.

- [205/45 R17](https://tirefitlab.com/205-45-r17.md)
- [215/45 R17](https://tirefitlab.com/215-45-r17.md)
- [225/45 R17](https://tirefitlab.com/225-45-r17.md)
- [235/45 R17](https://tirefitlab.com/235-45-r17.md)
- [245/45 R17](https://tirefitlab.com/245-45-r17.md)
- [225/45 R18](https://tirefitlab.com/225-45-r18.md)
- [235/45 R18](https://tirefitlab.com/235-45-r18.md)
- [245/45 R18](https://tirefitlab.com/245-45-r18.md)
- [255/45 R18](https://tirefitlab.com/255-45-r18.md)
- [245/45 R19](https://tirefitlab.com/245-45-r19.md)
- [255/45 R19](https://tirefitlab.com/255-45-r19.md)
- [275/45 R19](https://tirefitlab.com/275-45-r19.md)
- [285/45 R19](https://tirefitlab.com/285-45-r19.md)
- [245/45 R20](https://tirefitlab.com/245-45-r20.md)
- [255/45 R20](https://tirefitlab.com/255-45-r20.md)
- [265/45 R20](https://tirefitlab.com/265-45-r20.md)
- [275/45 R20](https://tirefitlab.com/275-45-r20.md)
- [265/45 R21](https://tirefitlab.com/265-45-r21.md)
- [275/45 R21](https://tirefitlab.com/275-45-r21.md)
- [275/45 R22](https://tirefitlab.com/275-45-r22.md)
- [285/45 R22](https://tirefitlab.com/285-45-r22.md)
- [305/45 R22](https://tirefitlab.com/305-45-r22.md)

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Methodology: https://tirefitlab.com/methodology/