205/60R19 vs 195/60R19
Going from one to the other changes the overall height by -1.6 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 205/60R19 | 195/60R19 | Change |
|---|---|---|---|
| Overall height | 28.7" | 28.2" | -1.6 % |
| Sidewall | 4.84" | 4.61" | -4.9 % |
| Section width | 205 mm | 195 mm | -4.9 % |
| Circumference | 90.1" | 88.6" | -1.6 % |
| Revs per mile | 703 | 715 | +1.6 % |
| Axle height | 14.34" | 14.11" | -6.0 mm |
| Approved rim width | 5.5–7.5" | 5.5–7" | overlap 5.5–7" |
Both are approved on a rim 5.5" to 7" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 205/60R19. Fit 195/60R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.5 mph | -0.5 |
| 50 mph | 49.2 mph | -0.8 |
| 70 mph | 68.8 mph | -1.2 |
| 90 mph | 88.5 mph | -1.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,835 on the road, so it over-counts by 165. At a true 70 mph the first turns 820 times a minute, the second 834.