245/55R19
245/55R19 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 29.61″ diameter with a 5.31″ sidewall (55% of section width), this size turns 681 revolutions per mile.
About 245/55R19
245/55R19 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 29.61″ overall diameter, 245/55R19 turns 681 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 55% 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. Going one step shorter to 235/55R19 drops diameter by 1.46%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 235/60R19 adds 1.66% 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 29.61″ 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 aliases245/55R19
- Diameter
- 29.61″ / 752.1mm
- Section Width
- 9.65″
- Sidewall
- 5.31″ / 134.75mm
- Circumference
- 93.02″
- Revs/Mile
- 681
225/55R19
- Diameter
- 28.74″ / 730.1mm
- Section Width
- 8.86″
- Sidewall
- 4.87″ / 123.75mm
- Circumference
- 90.3″
- Revs/Mile
- 702
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.24 mph (93.74 km/h). Your speedometer reads 2.93% high versus actual speed.