205/65R15
205/65R15 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 25.49″ diameter with a 5.25″ sidewall (65% of section width), this size turns 791 revolutions per mile.
About 205/65R15
205/65R15 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 25.49″ overall diameter, 205/65R15 turns 791 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 15″ rim pairing is typical for compact-car and economy-vehicle platforms, so compatible wheels are easy to source new or used. Going one step shorter to 185/70R15 drops diameter by 1.16%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 195/70R15 adds 1.00% 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 25.49″ 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 aliases205/65R15
- Diameter
- 25.49″ / 647.5mm
- Section Width
- 8.07″
- Sidewall
- 5.25″ / 133.25mm
- Circumference
- 80.09″
- Revs/Mile
- 791
185/65R15
- Diameter
- 24.47″ / 621.5mm
- Section Width
- 7.28″
- Sidewall
- 4.73″ / 120.25mm
- Circumference
- 76.87″
- Revs/Mile
- 824
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 57.59 mph (92.68 km/h). Your speedometer reads 4.02% high versus actual speed.