195/60R19 vs 205/60R19
Going from one to the other changes the overall height by +1.7 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 195/60R19 | 205/60R19 | Change |
|---|---|---|---|
| Overall height | 28.2" | 28.7" | +1.7 % |
| Sidewall | 4.61" | 4.84" | +5.1 % |
| Section width | 195 mm | 205 mm | +5.1 % |
| Circumference | 88.6" | 90.1" | +1.7 % |
| Revs per mile | 715 | 703 | -1.7 % |
| Axle height | 14.11" | 14.34" | +6.0 mm |
| Approved rim width | 5.5–7" | 5.5–7.5" | 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 195/60R19. Fit 205/60R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.5 mph | +0.5 |
| 50 mph | 50.8 mph | +0.8 |
| 70 mph | 71.2 mph | +1.2 |
| 90 mph | 91.5 mph | +1.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,167 on the road, so it under-counts by 167. At a true 70 mph the first turns 834 times a minute, the second 820.