225/50R16
225/50R16 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 24.86″ diameter with a 4.43″ sidewall (50% of section width), this size turns 811 revolutions per mile.
About 225/50R16
225/50R16 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 24.86″ overall diameter, 225/50R16 turns 811 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 16″ 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 215/50R16 drops diameter by 1.58%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 205/55R16 adds 0.08% 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 24.86″ 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 aliases225/50R16
- Diameter
- 24.86″ / 631.4mm
- Section Width
- 8.86″
- Sidewall
- 4.43″ / 112.5mm
- Circumference
- 78.09″
- Revs/Mile
- 811
205/50R16
- Diameter
- 24.07″ / 611.4mm
- Section Width
- 8.07″
- Sidewall
- 4.04″ / 102.5mm
- Circumference
- 75.62″
- Revs/Mile
- 838
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.1 mph (93.5 km/h). Your speedometer reads 3.17% high versus actual speed.