335/65R19 vs 355/65R19
Going from one to the other changes the overall height by +2.8 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 335/65R19 | 355/65R19 | Change |
|---|---|---|---|
| Overall height | 36.1" | 37.2" | +2.8 % |
| Sidewall | 8.57" | 9.08" | +6.0 % |
| Section width | 335 mm | 355 mm | +6.0 % |
| Circumference | 113.6" | 116.8" | +2.8 % |
| Revs per mile | 558 | 543 | -2.8 % |
| Axle height | 18.07" | 18.58" | +13.0 mm |
| Approved rim width | 9.5–12.5" | 10–13" | overlap 10–12.5" |
Both are approved on a rim 10" to 12.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 335/65R19. Fit 355/65R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.8 mph | +0.8 |
| 50 mph | 51.4 mph | +1.4 |
| 70 mph | 72.0 mph | +2.0 |
| 90 mph | 92.5 mph | +2.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,283 on the road, so it under-counts by 283. At a true 70 mph the first turns 651 times a minute, the second 633.