245/50R17
245/50R17 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 26.65″ diameter with a 4.82″ sidewall (50% of section width), this size turns 757 revolutions per mile.
About 245/50R17
245/50R17 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 26.65″ overall diameter, 245/50R17 turns 757 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 50% aspect ratio gives it a moderate sidewall suited to sporty street driving and responsive turn-in. The 17″ rim pairing is typical for light-truck, crossover, and mid-size SUV applications, so compatible wheels are easy to source new or used. Going one step shorter to 235/50R17 drops diameter by 1.48%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 225/55R17 adds 0.37% diameter — also inside the safe window, with marginally taller ride height. If you are shopping for a direct replacement, any tire within roughly ±0.7″ of the 26.65″ stock diameter (about ±2% in percentage terms) will keep ABS, TPMS, and odometer readings inside the vehicle's designed tolerance.
Compare with another size
275/65R18 or "33" for inch aliases245/50R17
- Diameter
- 26.65″ / 676.8mm
- Section Width
- 9.65″
- Sidewall
- 4.82″ / 122.5mm
- Circumference
- 83.71″
- Revs/Mile
- 757
225/50R17
- Diameter
- 25.86″ / 656.8mm
- Section Width
- 8.86″
- Sidewall
- 4.43″ / 112.5mm
- Circumference
- 81.24″
- Revs/Mile
- 780
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.23 mph (93.71 km/h). Your speedometer reads 2.96% high versus actual speed.