235/60R19 vs 245/55R19
Going from one to the other changes the overall height by -1.6 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 235/60R19 | 245/55R19 | Change |
|---|---|---|---|
| Overall height | 30.1" | 29.6" | -1.6 % |
| Sidewall | 5.55" | 5.31" | -4.4 % |
| Section width | 235 mm | 245 mm | +4.3 % |
| Circumference | 94.6" | 93.0" | -1.6 % |
| Revs per mile | 670 | 681 | +1.6 % |
| Axle height | 15.05" | 14.81" | -6.3 mm |
| Approved rim width | 6.5–8.5" | 7–9" | overlap 7–8.5" |
Both are approved on a rim 7" to 8.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 235/60R19. Fit 245/55R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.5 mph | -0.5 |
| 50 mph | 49.2 mph | -0.8 |
| 70 mph | 68.9 mph | -1.1 |
| 90 mph | 88.5 mph | -1.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,837 on the road, so it over-counts by 163. At a true 70 mph the first turns 782 times a minute, the second 795.
What drivers reported
Nobody has filed a complaint naming 235/60R19. 245/55R19 carries 35.