225/50R18 vs 225/55R17
225/55R17 is 3.0 mm shorter than 225/50R18 in overall diameter (−0.4%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 225/55R17 fitted, the speedometer reads 100 km/h when you are doing 99.6 km/h.
Dimensions side by side
| 225/50R18 | 225/55R17 | |
|---|---|---|
| Overall diameter | 682 mm (26.9″) | 679 mm (26.7″) |
| Section width | 225 mm | 225 mm |
| Sidewall height | 113 mm | 124 mm |
| Rim | 18″ | 17″ |
| Revolutions per km | 467 | 469 |
| In stock | 59 tires from $132.00 | 61 tires from $119.00 |
What changes
- Overall diameter: 225/55R17 is 3.0 mm shorter (−0.4%).
- Speedometer: reads 100 km/h at an actual 99.6 km/h with 225/55R17.
- 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 225/50R18
Vehicles that use 225/55R17
See every alternate size for 225/50R18
Frequently asked questions
Can I use 225/55R17 instead of 225/50R18?
Usually, yes: 225/55R17 is within 3% of the overall diameter of 225/50R18 (−0.4%). 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 225/50R18 and 225/55R17?
With 225/55R17 instead of 225/50R18, the speedometer shows 100 km/h when you are actually doing 99.6 km/h.
Which vehicles came with both 225/50R18 and 225/55R17?
Both sizes were original equipment, on different trims or packages, on the 2017–2024 Mini Countryman, 2017, 2020–2024 Mini Cooper, 2017 BMW 330i, 2016 BMW 328i, 2013–2015 Chevrolet Malibu, 2012–2014 Chrysler 200.