175/65R15 vs 195/65R15
195/65R15 is outside the ±3% rule as a replacement for 175/65R15: the diameter differs by +4.27%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 195/65R15 on a car calibrated for 175/65R15, the speedometer reads 57.5 mph when you're really doing 60, and the odometer under-counts by 4.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.3 mph |
| 45 mph | 46.9 mph |
| 60 mph | 62.6 mph |
| 70 mph | 73.0 mph |
| 80 mph | 83.4 mph |
Other sizes close to 175/65R15
- 175/65R15 vs 185/65R15+2.14%
- 175/65R15 vs 185/60R15-0.90%
- 175/65R15 vs 195/60R15+1.07%
- 175/65R15 vs 205/50R16+0.48%
- 175/65R15 vs 205/50R15-3.70%
- 175/65R15 vs 195/55R15-2.14%
- 175/65R15 vs 205/60R15+3.04%
- 175/65R15 vs 185/55R15-3.94%
- 175/65R15 vs 185/55R16+0.23%
- 175/65R15 vs 225/45R15-4.11%
- 175/65R15 vs 225/50R15-0.41%
Questions
Can I replace 175/65R15 with 195/65R15?
195/65R15 is outside the ±3% rule as a replacement for 175/65R15: the diameter differs by +4.27%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 175/65R15 and 195/65R15?
195/65R15 is 1.02" taller and 20 mm wider; the sidewall is +0.51". At an indicated 60 mph you'd actually be doing 62.6 mph.
Will 195/65R15 fit on 175/65R15 wheels?
Both use a 15" rim, so the wheel diameter matches; check the wheel's width range for a 195 mm tire and the fender clearance.