/55 series tire aspect ratio
What does /55 mean in a tire size?
A /55 aspect ratio means the tire sidewall height is 55% of the section width. For a 205/55R16 tire, the sidewall is 112.75mm tall. Common 55-series sizes span multiple rim diameters.
- A /55 aspect ratio means the tire sidewall height is 55% of the section width.
- For a 205/55R16 tire, the sidewall is 112.75mm tall.
- Common 55-series sizes span multiple rim diameters.
FAQ
- What does /55 mean in a tire size?
- A /55 aspect ratio means the tire sidewall height is 55% of the section width. For a 205/55R16 tire, the sidewall is 112.75mm tall. Common 55-series sizes span multiple rim diameters.
- What should I verify before using this information?
- Use TireFitLab values as a sizing reference, then verify the vehicle handbook, tire placard, rim compatibility, load rating, and physical clearance before fitting.
16 popular /55 series sizes
- 185/55 R15
- 195/55 R15
- 195/55 R16
- 205/55 R16
- 215/55 R16
- 225/55 R16
- 205/55 R17
- 215/55 R17
- 225/55 R17
- 235/55 R17
- 225/55 R18
- 235/55 R18
- 255/55 R18
- 235/55 R19
- 275/55 R19
- 275/55 R20
Full aspect ratio guide · Tire section width guide · Tire size calculator
Seasonal check
Planning a long summer drive?
Use the budget and running-cost tools before a trip, especially if the current tyres are worn or the replacement size changes diameter.
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.