275/55R19
275/55R19 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 30.91″ diameter with a 5.95″ sidewall (55% of section width), this size turns 652 revolutions per mile.
About 275/55R19
275/55R19 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 30.91″ overall diameter, 275/55R19 turns 652 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 265/55R19 drops diameter by 1.40%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 255/60R19 adds 0.45% 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 30.91″ 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 aliases275/55R19
- Diameter
- 30.91″ / 785.1mm
- Section Width
- 10.83″
- Sidewall
- 5.95″ / 151.25mm
- Circumference
- 97.1″
- Revs/Mile
- 652
255/55R19
- Diameter
- 30.04″ / 763.1mm
- Section Width
- 10.04″
- Sidewall
- 5.52″ / 140.25mm
- Circumference
- 94.38″
- Revs/Mile
- 671
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.32 mph (93.85 km/h). Your speedometer reads 2.80% high versus actual speed.