175/65R14 vs 195/60R15
New overall diameter
24.21″
was 22.96″
True speed at an indicated 60
63.3 mph
speedometer reads low
Revolutions per mile
833
was 879 · −46
Switching from 175/65R14 to 195/60R15? Everything that changes is below — sidewall, tread width, circumference, revolutions per mile and speedometer error at road speeds.
| Measurement | 175/65R14 | 195/60R15 | Change |
|---|---|---|---|
| Overall diameter | 22.96″ | 24.21″ | +1.26″ (+5.5%) |
| Sidewall height | 4.48″ (113.8 mm) | 4.61″ (117.0 mm) | +3.3 mm |
| Tread width | 175 mm | 195 mm | +20 mm |
| Circumference | 72.12″ | 76.07″ | +3.95″ |
| Revs per mile | 879 | 833 | −46 |
| Speedometer error | baseline | +5.5% | reads low |
Diameter overlay
175/65R14 195/60R15
Speedometer check
With 195/60R15 fitted, when the speedometer shows the indicated speed, your actual speed is:
25 mph shown
26.4 mph actual
35 mph shown
36.9 mph actual
45 mph shown
47.5 mph actual
55 mph shown
58.0 mph actual
65 mph shown
68.6 mph actual
75 mph shown
79.1 mph actual
Common questions
- Will 195/60R15 fit instead of 175/65R14?
- Not recommended. A 5.5% diameter change exceeds the 5% rule. Expect significant speedometer error, potential clearance and rubbing issues, and stress on ABS, stability control and drivetrain components. Your speedometer will read lower than your true speed. Overall diameter goes from 22.96″ to 24.21″, a change of +5.5%. As a rule of thumb, under 3% is safe, 3–5% needs a clearance check, and over 5% is not recommended.
- How far off will my speedometer read on 195/60R15?
- At an indicated 60 mph you would actually be travelling about 63.3 mph — a +5.5% error. The speedometer reads low, so you are going faster than it shows.
- What is the difference in revolutions per mile between 175/65R14 and 195/60R15?
- 175/65R14 turns roughly 879 revolutions per mile; 195/60R15 turns roughly 833. That is a change of −46 revolutions per mile, which is what shifts odometer and speedometer readings.