175/65R15
175/65R15 is uncommon as OEM fitment but appears as an aftermarket upsize option. At 23.96″ diameter with a 4.48″ sidewall (65% of section width), this size turns 842 revolutions per mile.
About 175/65R15
175/65R15 is less common as a factory fitment but is available as an aftermarket size, so SKU selection is narrower than mainstream OEM sizes. At 23.96″ overall diameter, 175/65R15 turns 842 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 185/55R15 drops diameter by 3.94%, which stays within the ±3% fitment safe zone for most vehicles. Stepping up to 185/65R15 adds 2.14% 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 23.96″ 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 aliases175/65R15
- Diameter
- 23.96″ / 608.5mm
- Section Width
- 6.89″
- Sidewall
- 4.48″ / 113.75mm
- Circumference
- 75.26″
- Revs/Mile
- 842
175/70R15
- Diameter
- 24.65″ / 626mm
- Section Width
- 6.89″
- Sidewall
- 4.82″ / 122.5mm
- Circumference
- 77.43″
- Revs/Mile
- 818
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.73 mph (99.34 km/h). Your speedometer reads 2.88% low versus actual speed.