255/65R19
255/65R19 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 32.05″ diameter with a 6.53″ sidewall (65% of section width), this size turns 629 revolutions per mile.
About 255/65R19
255/65R19 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 32.05″ overall diameter, 255/65R19 turns 629 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 65% aspect ratio gives it a balanced sidewall — enough compliance for daily comfort without vague steering. 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 245/65R19 drops diameter by 1.60%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 265/65R19 adds 1.60% 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 32.05″ 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 aliases255/65R19
- Diameter
- 32.05″ / 814.1mm
- Section Width
- 10.04″
- Sidewall
- 6.53″ / 165.75mm
- Circumference
- 100.69″
- Revs/Mile
- 629
235/65R19
- Diameter
- 31.03″ / 788.1mm
- Section Width
- 9.25″
- Sidewall
- 6.01″ / 152.75mm
- Circumference
- 97.48″
- Revs/Mile
- 650
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 58.08 mph (93.48 km/h). Your speedometer reads 3.19% high versus actual speed.