355/65R22 vs 335/65R22
Going from one to the other changes the overall height by -2.5 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 355/65R22 | 335/65R22 | Change |
|---|---|---|---|
| Overall height | 40.2" | 39.1" | -2.5 % |
| Sidewall | 9.08" | 8.57" | -5.6 % |
| Section width | 355 mm | 335 mm | -5.6 % |
| Circumference | 126.2" | 123.0" | -2.5 % |
| Revs per mile | 502 | 515 | +2.5 % |
| Axle height | 20.08" | 19.57" | -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 355/65R22. Fit 335/65R22 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 | 68.2 mph | -1.8 |
| 90 mph | 87.7 mph | -2.3 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,745 on the road, so it over-counts by 255. At a true 70 mph the first turns 586 times a minute, the second 601.