225/55R16 vs 245/45R17
245/45R17 is 2.0 mm shorter than 225/55R16 in overall diameter (−0.3%), within the usual 3% limit, so it can replace it where the wheels and clearance allow. With 245/45R17 fitted, the speedometer reads 100 km/h when you are doing 99.7 km/h.
Dimensions side by side
| 225/55R16 | 245/45R17 | |
|---|---|---|
| Overall diameter | 654 mm (25.7″) | 652 mm (25.7″) |
| Section width | 225 mm | 245 mm |
| Sidewall height | 124 mm | 110 mm |
| Rim | 16″ | 17″ |
| Revolutions per km | 487 | 488 |
| In stock | 5 tires from $109.00 | 18 tires from $113.00 |
What changes
- Overall diameter: 245/45R17 is 2.0 mm shorter (−0.3%).
- Speedometer: reads 100 km/h at an actual 99.7 km/h with 245/45R17.
- 245/45R17 is 20 mm wider, so check clearance and the recommended rim width.
- Wheel size changes from 16″ 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 225/55R16
Vehicles that use 245/45R17
See every alternate size for 225/55R16
Frequently asked questions
Can I use 245/45R17 instead of 225/55R16?
Usually, yes: 245/45R17 is within 3% of the overall diameter of 225/55R16 (−0.3%). 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 225/55R16 and 245/45R17?
With 245/45R17 instead of 225/55R16, the speedometer shows 100 km/h when you are actually doing 99.7 km/h.
Which vehicles came with both 225/55R16 and 245/45R17?
Both sizes were original equipment, on different trims or packages, on the 2006 Mercedes-Benz E350, 2005 Audi A6, 2005 Mercedes-Benz E320, 2004 BMW 525i, 1994–2000 Ford Mustang.