355/65R19 vs 335/65R19
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 | 355/65R19 | 335/65R19 | Change |
|---|---|---|---|
| Overall height | 37.2" | 36.1" | -2.8 % |
| Sidewall | 9.08" | 8.57" | -5.6 % |
| Section width | 355 mm | 335 mm | -5.6 % |
| Circumference | 116.8" | 113.6" | -2.8 % |
| Revs per mile | 543 | 558 | +2.8 % |
| Axle height | 18.58" | 18.07" | -13.0 mm |
| Approved rim width | 10–13" | 9.5–12.5" | 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 355/65R19. Fit 335/65R19 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.2 mph | -0.8 |
| 50 mph | 48.6 mph | -1.4 |
| 70 mph | 68.1 mph | -1.9 |
| 90 mph | 87.5 mph | -2.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,725 on the road, so it over-counts by 275. At a true 70 mph the first turns 633 times a minute, the second 651.