195/50R19
195/50R19 ships as an OEM size on the Toyota Prius. At 26.68″ diameter with a 3.84″ sidewall (50% of section width), this size turns 756 revolutions per mile.
About 195/50R19
Factory fitments for 195/50R19 include the Toyota Prius — meaning replacement tires in this size see steady demand and broad brand availability. At 26.68″ overall diameter, 195/50R19 turns 756 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 19″ rim pairing is typical for full-size truck, premium SUV, and sport-sedan platforms, so compatible wheels are easy to source new or used. If you are shopping for a direct replacement, any tire within roughly ±0.7″ of the 26.68″ 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 aliases195/50R19
- Diameter
- 26.68″ / 677.6mm
- Section Width
- 7.68″
- Sidewall
- 3.84″ / 97.5mm
- Circumference
- 83.81″
- Revs/Mile
- 756
265/70R17
- Diameter
- 31.61″ / 802.8mm
- Section Width
- 10.43″
- Sidewall
- 7.3″ / 185.5mm
- Circumference
- 99.29″
- Revs/Mile
- 638
Speedometer & Diameter Impact
Different rim — new wheels requiredWider tire — verify wheel widthAt an indicated 60 mph, your actual speed is 71.09 mph (114.4 km/h). Your speedometer reads 18.48% low versus actual speed.