195/60R19 vs 215/50R19
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 | 195/60R19 | 215/50R19 | Change |
|---|---|---|---|
| Overall height | 28.2" | 27.5" | -2.7 % |
| Sidewall | 4.61" | 4.23" | -8.1 % |
| Section width | 195 mm | 215 mm | +10.3 % |
| Circumference | 88.6" | 86.3" | -2.7 % |
| Revs per mile | 715 | 734 | +2.7 % |
| Axle height | 14.11" | 13.73" | -9.5 mm |
| Approved rim width | 5.5–7" | 6–8" | 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 195/60R19. Fit 215/50R19 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 834 times a minute, the second 857.