Tyre size calculator
Equivalent sizes for the 205/45 R18 tyre
Sidewall height 92 mmDiameter 642 mm Circumference 2016 mmRevolutions/km 496
Approved rim widths according to ETRTO: 7" – 6,5" – 7,5"
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 |
|---|---|---|---|---|
| 225/45 R17 | -1.15 % | 98.9 km/h | 7,5" – 7" – 8" – 8,5" | |
| 205/50 R17 | -0.75 % | 99.3 km/h | 6,5" – 5,5" – 6" – 7" – 7,5" | |
| 235/45 R17 | +0.28 % | 100.3 km/h | 8" – 7,5" – 8,5" – 9" | |
| 195/55 R17 | +0.71 % | 100.7 km/h | — | |
| 215/50 R17 | +0.79 % | 100.8 km/h | 7" – 6" – 6,5" – 7,5" |
18″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 215/40 R18 | -1.94 % | 98.1 km/h | 7,5" – 7" – 8" – 8,5" | |
| 225/40 R18 | -0.67 % | 99.3 km/h | 8" – 7,5" – 8,5" – 9" | |
| 205/45 R18 Your size | 0 % | 100.0 km/h | 7" – 6,5" – 7,5" | |
| 235/40 R18 | +0.55 % | 100.6 km/h | 8,5" – 8" – 9" – 9,5" | |
| 215/45 R18 | +1.43 % | 101.4 km/h | 7" – 7,5" – 8" |
19″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 215/35 R19 | -1.31 % | 98.7 km/h | 7,5" – 7" – 8" – 8,5" | — |
| 225/35 R19 | -0.24 % | 99.8 km/h | 8" – 7,5" – 8,5" – 9" | |
| 235/35 R19 | +0.87 % | 100.9 km/h | 8,5" – 8" – 9" – 9,5" |
20″
| Size | Difference | Actual speed at 100 km/h on the speedometer | ETRTO rims | Tyres in stock |
|---|---|---|---|---|
| 225/30 R20 | +0.20 % | 100.2 km/h | 8" | — |
| 235/30 R20 | +1.15 % | 101.2 km/h | 8,5" |
Sizes equivalent to 205/45 R18:
225/45 R17205/50 R17235/45 R17195/55 R17215/50 R17215/40 R18225/40 R18235/40 R18215/45 R18215/35 R19225/35 R19235/35 R19225/30 R20235/30 R20
205/45 R18 tyres in stock
View all 3 205/45 R18 tyres ›This information is provided for guidance only and does not engage Rupteur's liability in any way.
