225/65R18
225/65R18 ships as an OEM size on the Toyota RAV4. At 29.52″ diameter with a 5.76″ sidewall (65% of section width), this size turns 683 revolutions per mile.
About 225/65R18
Factory fitments for 225/65R18 include the Toyota RAV4 — meaning replacement tires in this size see steady demand and broad brand availability. At 29.52″ overall diameter, 225/65R18 turns 683 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 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 235/60R18 drops diameter by 1.40%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 245/60R18 adds 0.20% 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 29.52″ 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 aliases225/65R18
- Diameter
- 29.52″ / 749.7mm
- Section Width
- 8.86″
- Sidewall
- 5.76″ / 146.25mm
- Circumference
- 92.73″
- Revs/Mile
- 683
215/60R18
- Diameter
- 28.16″ / 715.2mm
- Section Width
- 8.46″
- Sidewall
- 5.08″ / 129mm
- Circumference
- 88.46″
- Revs/Mile
- 716
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.24 mph (92.12 km/h). Your speedometer reads 4.60% high versus actual speed.