195/85R19 vs 215/75R19
Going from one to the other changes the overall height by -1.1 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 195/85R19 | 215/75R19 | Change |
|---|---|---|---|
| Overall height | 32.1" | 31.7" | -1.1 % |
| Sidewall | 6.53" | 6.35" | -2.7 % |
| Section width | 195 mm | 215 mm | +10.3 % |
| Circumference | 100.7" | 99.6" | -1.1 % |
| Revs per mile | 629 | 636 | +1.1 % |
| Axle height | 16.03" | 15.85" | -4.5 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 195/85R19. Fit 215/75R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.7 mph | -0.3 |
| 50 mph | 49.4 mph | -0.6 |
| 70 mph | 69.2 mph | -0.8 |
| 90 mph | 89.0 mph | -1.0 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,889 on the road, so it over-counts by 111. At a true 70 mph the first turns 734 times a minute, the second 742.