225/50R17 vs 245/45R17
245/45R17 is 5.0 mm shorter than 225/50R17 in overall diameter (−0.8%), 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 99.2 km/h.
Dimensions side by side
| 225/50R17 | 245/45R17 | |
|---|---|---|
| Overall diameter | 657 mm (25.9″) | 652 mm (25.7″) |
| Section width | 225 mm | 245 mm |
| Sidewall height | 113 mm | 110 mm |
| Rim | 17″ | 17″ |
| Revolutions per km | 484 | 488 |
| In stock | 51 tires from $111.00 | 18 tires from $113.00 |
What changes
- Overall diameter: 245/45R17 is 5.0 mm shorter (−0.8%).
- Speedometer: reads 100 km/h at an actual 99.2 km/h with 245/45R17.
- 245/45R17 is 20 mm wider, so check clearance and the recommended rim width.
- Choose a load index at least as high as the one on your door placard.
Vehicles that came with both sizes
Vehicles that use 225/50R17
Vehicles that use 245/45R17
See every alternate size for 225/50R17
Frequently asked questions
Can I use 245/45R17 instead of 225/50R17?
Usually, yes: 245/45R17 is within 3% of the overall diameter of 225/50R17 (−0.8%). 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 225/50R17 and 245/45R17?
With 245/45R17 instead of 225/50R17, the speedometer shows 100 km/h when you are actually doing 99.2 km/h.
Which vehicles came with both 225/50R17 and 245/45R17?
Both sizes were original equipment, on different trims or packages, on the 2009 Volvo S80, 2008 Audi A4, 2005–2007 BMW 525i, 2006–2007 BMW 525xi.