245/55R19 vs 265/55R19
Going from one to the other changes the overall height by +2.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 245/55R19 | 265/55R19 | Change |
|---|---|---|---|
| Overall height | 29.6" | 30.5" | +2.9 % |
| Sidewall | 5.31" | 5.74" | +8.2 % |
| Section width | 245 mm | 265 mm | +8.2 % |
| Circumference | 93.0" | 95.7" | +2.9 % |
| Revs per mile | 681 | 662 | -2.9 % |
| Axle height | 14.81" | 15.24" | +11.0 mm |
| Approved rim width | 7–9" | 7.5–9.5" | 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 245/55R19. Fit 265/55R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.9 mph | +0.9 |
| 50 mph | 51.5 mph | +1.5 |
| 70 mph | 72.0 mph | +2.0 |
| 90 mph | 92.6 mph | +2.6 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,293 on the road, so it under-counts by 293. At a true 70 mph the first turns 795 times a minute, the second 772.
What drivers reported
245/55R19 carries 35 complaints. Nobody has filed one naming 265/55R19.