/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.
- 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.
FAQ
- 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.
- 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.
22 popular /45 series sizes
- 205/45 R17
- 215/45 R17
- 225/45 R17
- 235/45 R17
- 245/45 R17
- 225/45 R18
- 235/45 R18
- 245/45 R18
- 255/45 R18
- 245/45 R19
- 255/45 R19
- 275/45 R19
- 285/45 R19
- 245/45 R20
- 255/45 R20
- 265/45 R20
- 275/45 R20
- 265/45 R21
- 275/45 R21
- 275/45 R22
- 285/45 R22
- 305/45 R22
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.