175/60R14 vs 195/50R14
Going from one to the other changes the overall height by -2.7 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 175/60R14 | 195/50R14 | Change |
|---|---|---|---|
| Overall height | 22.3" | 21.7" | -2.7 % |
| Sidewall | 4.13" | 3.84" | -7.1 % |
| Section width | 175 mm | 195 mm | +11.4 % |
| Circumference | 70.0" | 68.1" | -2.7 % |
| Revs per mile | 906 | 930 | +2.7 % |
| Axle height | 11.13" | 10.84" | -7.5 mm |
| Approved rim width | 5–6" | 5.5–7" | overlap 5.5–6" |
Both are approved on a rim 5.5" to 6" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 175/60R14. Fit 195/50R14 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.2 mph | -0.8 |
| 50 mph | 48.7 mph | -1.3 |
| 70 mph | 68.1 mph | -1.9 |
| 90 mph | 87.6 mph | -2.4 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,735 on the road, so it over-counts by 265. At a true 70 mph the first turns 1057 times a minute, the second 1085.