265/50R19 vs 245/50R19
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 | 265/50R19 | 245/50R19 | Change |
|---|---|---|---|
| Overall height | 29.4" | 28.6" | -2.7 % |
| Sidewall | 5.22" | 4.82" | -7.5 % |
| Section width | 265 mm | 245 mm | -7.5 % |
| Circumference | 92.5" | 90.0" | -2.7 % |
| Revs per mile | 685 | 704 | +2.7 % |
| Axle height | 14.72" | 14.32" | -10.0 mm |
| Approved rim width | 7.5–9.5" | 7–9" | overlap 7.5–9" |
Both are approved on a rim 7.5" to 9" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 265/50R19. Fit 245/50R19 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 9,732 on the road, so it over-counts by 268. At a true 70 mph the first turns 799 times a minute, the second 821.
What drivers reported
265/50R19 carries 2 complaints. Nobody has filed one naming 245/50R19.