235/55R19 vs 215/55R19
Going from one to the other changes the overall height by -3.0 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 235/55R19 | 215/55R19 | Change |
|---|---|---|---|
| Overall height | 29.2" | 28.3" | -3.0 % |
| Sidewall | 5.09" | 4.66" | -8.5 % |
| Section width | 235 mm | 215 mm | -8.5 % |
| Circumference | 91.7" | 88.9" | -3.0 % |
| Revs per mile | 691 | 712 | +3.0 % |
| Axle height | 14.59" | 14.16" | -11.0 mm |
| Approved rim width | 6.5–8.5" | 6–8" | overlap 6.5–8" |
Both are approved on a rim 6.5" to 8" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 235/55R19. Fit 215/55R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.1 mph | -0.9 |
| 50 mph | 48.5 mph | -1.5 |
| 70 mph | 67.9 mph | -2.1 |
| 90 mph | 87.3 mph | -2.7 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,703 on the road, so it over-counts by 297. At a true 70 mph the first turns 806 times a minute, the second 831.
What drivers reported
235/55R19 carries 5 complaints. Nobody has filed one naming 215/55R19.