Tyre size calculator
Equivalent sizes for the 285/30 R18 tyre
Sidewall height 86 mmDiameter 628 mm Circumference 1974 mmRevolutions/km 507
Approved rim widths according to ETRTO: 10" – 9,5" – 10,5"
To be approved, a tyre's diameter may differ by no more than 2 %. The vehicle's load and speed indices must also be respected.
17″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 255/40 R17 | +1.21 % | 101.2 km/h | 9" – 8,5" – 9,5" – 10" | — |
18″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 285/30 R18 Your size | 0 % | 100.0 km/h | 10" – 9,5" – 10,5" | — |
| 295/30 R18 | +0.97 % | 101.0 km/h | 10,5" – 10" – 11" | — |
| 255/35 R18 | +1.21 % | 101.2 km/h | 9" – 8,5" – 9,5" – 10" |
19″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 305/25 R19 | +1.09 % | 101.1 km/h | 11" – 10,5" – 11,5" | — |
| 255/30 R19 | +1.17 % | 101.2 km/h | 9" – 8,5" – 9,5" | |
| 315/25 R19 | +1.90 % | 101.9 km/h | 11,5" – 11" – 12" | — |
20″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 265/25 R20 | +1.98 % | 102.0 km/h | — | — |
Sizes equivalent to 285/30 R18:
255/40 R17295/30 R18255/35 R18305/25 R19255/30 R19315/25 R19265/25 R20
This information is provided for guidance only and does not engage Rupteur's liability in any way.