215/60R14 vs 195/70R14
Going from one to the other changes the overall height by +2.4 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 215/60R14 | 195/70R14 | Change |
|---|---|---|---|
| Overall height | 24.2" | 24.7" | +2.4 % |
| Sidewall | 5.08" | 5.37" | +5.8 % |
| Section width | 215 mm | 195 mm | -9.3 % |
| Circumference | 75.9" | 77.7" | +2.4 % |
| Revs per mile | 835 | 815 | -2.4 % |
| Axle height | 12.08" | 12.37" | +7.5 mm |
| Approved rim width | 6–8" | 5.5–7" | overlap 6–7" |
Both are approved on a rim 6" to 7" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 215/60R14. Fit 195/70R14 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.7 mph | +0.7 |
| 50 mph | 51.2 mph | +1.2 |
| 70 mph | 71.7 mph | +1.7 |
| 90 mph | 92.2 mph | +2.2 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,244 on the road, so it under-counts by 244. At a true 70 mph the first turns 974 times a minute, the second 951.