245/60R18
245/60R18 ships as an OEM size on the Ford Edge, Honda Passport, Honda Pilot. At 29.57″ diameter with a 5.79″ sidewall (60% of section width), this size turns 682 revolutions per mile.
About 245/60R18
Factory fitments for 245/60R18 include the Ford Edge, Honda Passport, Honda Pilot — meaning replacement tires in this size see steady demand and broad brand availability. At 29.57″ overall diameter, 245/60R18 turns 682 revolutions per mile, which is the reference point the factory speedometer and odometer were calibrated against. The 60% aspect ratio gives it a balanced sidewall — enough compliance for daily comfort without vague steering. The 18″ 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 225/65R18 drops diameter by 0.20%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 235/65R18 adds 1.53% 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 29.57″ 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 aliases245/60R18
- Diameter
- 29.57″ / 751.2mm
- Section Width
- 9.65″
- Sidewall
- 5.79″ / 147mm
- Circumference
- 92.91″
- Revs/Mile
- 682
225/60R18
- Diameter
- 28.63″ / 727.2mm
- Section Width
- 8.86″
- Sidewall
- 5.31″ / 135mm
- Circumference
- 89.94″
- Revs/Mile
- 704
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.