215/40R18 vs 215/45R17
215/45R17 is 4.0 mm shorter than 215/40R18 in overall diameter (−0.6%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 215/45R17 fitted, the speedometer reads 100 km/h when you are doing 99.4 km/h.
Dimensions side by side
| 215/40R18 | 215/45R17 | |
|---|---|---|
| Overall diameter | 629 mm (24.8″) | 625 mm (24.6″) |
| Section width | 215 mm | 215 mm |
| Sidewall height | 86 mm | 97 mm |
| Rim | 18″ | 17″ |
| Revolutions per km | 506 | 509 |
| In stock | 6 tires from $184.00 | 55 tires from $104.00 |
What changes
- Overall diameter: 215/45R17 is 4.0 mm shorter (−0.6%).
- Speedometer: reads 100 km/h at an actual 99.4 km/h with 215/45R17.
- Wheel size changes from 18″ to 17″: you need wheels in the new size.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 215/40R18
Vehicles that use 215/45R17
See every alternate size for 215/40R18
Frequently asked questions
Can I use 215/45R17 instead of 215/40R18?
Usually, yes: 215/45R17 is within 3% of the overall diameter of 215/40R18 (−0.6%). Use wheels of the right size and width, match or exceed the original load index, and check clearance at full steering lock.
How much does the speedometer change between 215/40R18 and 215/45R17?
With 215/45R17 instead of 215/40R18, the speedometer shows 100 km/h when you are actually doing 99.4 km/h.
Which vehicles came with both 215/40R18 and 215/45R17?
Both sizes were original equipment, on different trims or packages, on the 2024 Toyota GR86, 2020 Toyota 86, 2012–2015 Hyundai Veloster, 2006–2013 Honda Civic.