215/60R19 vs 205/65R19
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 | 215/60R19 | 205/65R19 | Change |
|---|---|---|---|
| Overall height | 29.2" | 29.5" | +1.1 % |
| Sidewall | 5.08" | 5.25" | +3.3 % |
| Section width | 215 mm | 205 mm | -4.7 % |
| Circumference | 91.6" | 92.7" | +1.1 % |
| Revs per mile | 692 | 684 | -1.1 % |
| Axle height | 14.58" | 14.75" | +4.3 mm |
| Approved rim width | 6–8" | 5.5–7.5" | overlap 6–7.5" |
Both are approved on a rim 6" to 7.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 215/60R19. Fit 205/65R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.3 mph | +0.3 |
| 50 mph | 50.6 mph | +0.6 |
| 70 mph | 70.8 mph | +0.8 |
| 90 mph | 91.0 mph | +1.0 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,115 on the road, so it under-counts by 115. At a true 70 mph the first turns 807 times a minute, the second 798.