Metric Size 235/40R18 in Width — Car Tyres Tyres
Metric 235/40R18 =
Width 9.3"
A 235/40R18 tyre has a width (inches) of 9.3". This is a standard measurement used to compare tyre dimensions across different sizing systems.
When replacing tyres, always check your vehicle's manual or door placard for the recommended tyre size. Changing dimensions can affect speedometer accuracy, handling, and fuel economy.
Quick Converter
Metric 235/40R18 =
Width 9.3"
Full Metric to Width Car Tyres Tyres Size Chart
| Metric | Width |
|---|---|
| 155/65R14 | 6.1" |
| 165/65R14 | 6.5" |
| 175/65R14 | 6.9" |
| 185/65R14 | 7.3" |
| 175/65R15 | 6.9" |
| 185/65R15 | 7.3" |
| 195/65R15 | 7.7" |
| 205/65R15 | 8.1" |
| 185/55R15 | 7.3" |
| 195/55R15 | 7.7" |
| 185/60R15 | 7.3" |
| 195/60R15 | 7.7" |
| 205/55R16 | 8.1" |
| 215/55R16 | 8.5" |
| 225/55R16 | 8.9" |
| 205/60R16 | 8.1" |
| 215/60R16 | 8.5" |
| 225/60R16 | 8.9" |
| 215/45R17 | 8.5" |
| 225/45R17 | 8.9" |
| 235/45R17 | 9.3" |
| 245/45R17 | 9.6" |
| 215/50R17 | 8.5" |
| 225/50R17 | 8.9" |
| 215/55R17 | 8.5" |
| 225/55R17 | 8.9" |
| 235/55R17 | 9.3" |
| 225/40R18 | 8.9" |
| 235/40R18 | 9.3" |
| 245/40R18 | 9.6" |
| 255/40R18 | 10.0" |
| 225/45R18 | 8.9" |
| 235/45R18 | 9.3" |
| 245/45R18 | 9.6" |
| 235/50R18 | 9.3" |
| 235/55R18 | 9.3" |
| 235/35R19 | 9.3" |
| 245/35R19 | 9.6" |
| 255/35R19 | 10.0" |
| 245/40R19 | 9.6" |
| 255/40R19 | 10.0" |
| 245/45R19 | 9.6" |
| 255/45R19 | 10.0" |
| 245/35R20 | 9.6" |
| 255/35R20 | 10.0" |
| 275/35R20 | 10.8" |
| 245/40R20 | 9.6" |
| 255/40R20 | 10.0" |
| 275/40R20 | 10.8" |
| 255/45R20 | 10.0" |
Frequently Asked Questions
- What does the tyre size 235/40R18 mean?
- The metric size 235/40R18 has a width of 9.3". The numbers represent width (mm), aspect ratio (%), and rim diameter (inches).
- Can I use a different tyre size than recommended?
- You should stick to sizes recommended by your vehicle manufacturer. Different sizes can affect handling, speedometer accuracy, and safety. Consult a tyre specialist before changing sizes.
- What if Metric size 235/40R18 is too small — what's the next size up in Width?
- The next size up from Metric 235/40R18 is Metric 245/40R18, which converts to Width 9.6".