Diameter to Metric Car Tyres Tyres Size Chart
Complete Diameter to Metric size conversion chart for car tyres tyres. Click any size for a detailed conversion.
Quick Converter
| Diameter | Metric |
|---|---|
| 22.1" | 155/65R14 |
| 22.4" | 165/65R14 |
| 22.8" | 175/65R14 |
| 23.2" | 185/65R14 |
| 24.0" | 175/65R15 |
| 24.5" | 185/65R15 |
| 25.0" | 195/65R15 |
| 25.5" | 205/65R15 |
| 23.0" | 185/55R15 |
| 23.4" | 195/55R15 |
| 23.7" | 185/60R15 |
| 24.2" | 195/60R15 |
| 24.9" | 205/55R16 |
| 25.3" | 215/55R16 |
| 25.7" | 225/55R16 |
| 25.7" | 205/60R16 |
| 26.2" | 215/60R16 |
| 26.6" | 225/60R16 |
| 24.6" | 215/45R17 |
| 25.0" | 225/45R17 |
| 25.3" | 235/45R17 |
| 25.7" | 245/45R17 |
| 25.5" | 215/50R17 |
| 25.9" | 225/50R17 |
| 26.3" | 215/55R17 |
| 26.7" | 225/55R17 |
| 27.2" | 235/55R17 |
| 25.1" | 225/40R18 |
| 25.4" | 235/40R18 |
| 25.7" | 245/40R18 |
| 26.0" | 255/40R18 |
| 26.0" | 225/45R18 |
| 26.3" | 235/45R18 |
| 26.7" | 245/45R18 |
| 27.3" | 235/50R18 |
| 28.2" | 235/55R18 |
| 25.5" | 235/35R19 |
| 25.8" | 245/35R19 |
| 26.0" | 255/35R19 |
| 26.7" | 245/40R19 |
| 27.0" | 255/40R19 |
| 27.7" | 245/45R19 |
| 28.0" | 255/45R19 |
| 26.8" | 245/35R20 |
| 27.0" | 255/35R20 |
| 27.6" | 275/35R20 |
| 27.7" | 245/40R20 |
| 28.0" | 255/40R20 |
| 28.7" | 275/40R20 |
| 29.0" | 255/45R20 |
Frequently Asked Questions
- How do I read the diameter tyre size notation?
- A metric tyre size like 26.7" describes the width in mm, aspect ratio as a percentage, and rim diameter in inches. For example, 26.7" has a metric of 225/55R17.
- Can I change my tyre size?
- You should only use sizes recommended by your vehicle manufacturer. Different sizes affect speedometer accuracy, handling, and fuel economy. Consult a tyre specialist for advice.
- What is the overall diameter of a 26.7" tyre?
- A 26.7" tyre has a metric of 225/55R17. The overall diameter affects ground clearance and speedometer calibration.