255/45R19
255/45R19 ships as an OEM size on the Tesla Model Y. At 28.04″ diameter with a 4.52″ sidewall (45% of section width), this size turns 719 revolutions per mile.
About 255/45R19
Factory fitments for 255/45R19 include the Tesla Model Y — meaning replacement tires in this size see steady demand and broad brand availability. At 28.04″ overall diameter, 255/45R19 turns 719 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 45% aspect ratio gives it a low-profile sidewall that delivers sharp steering response but transmits road imperfections. 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. Going one step shorter to 245/45R19 drops diameter by 1.26%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 235/50R19 adds 0.77% 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 28.04″ 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 aliases255/45R19
- Diameter
- 28.04″ / 712.1mm
- Section Width
- 10.04″
- Sidewall
- 4.52″ / 114.75mm
- Circumference
- 88.08″
- Revs/Mile
- 719
235/45R19
- Diameter
- 27.33″ / 694.1mm
- Section Width
- 9.25″
- Sidewall
- 4.16″ / 105.75mm
- Circumference
- 85.85″
- Revs/Mile
- 738
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.48 mph (94.12 km/h). Your speedometer reads 2.53% high versus actual speed.