335/35R22 vs 355/30R22
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 | 335/35R22 | 355/30R22 | Change |
|---|---|---|---|
| Overall height | 31.2" | 30.4" | -2.7 % |
| Sidewall | 4.62" | 4.19" | -9.2 % |
| Section width | 335 mm | 355 mm | +6.0 % |
| Circumference | 98.1" | 95.5" | -2.7 % |
| Revs per mile | 646 | 664 | +2.7 % |
| Axle height | 15.62" | 15.19" | -10.8 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 335/35R22. Fit 355/30R22 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 | 87.6 mph | -2.4 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,729 on the road, so it over-counts by 271. At a true 70 mph the first turns 753 times a minute, the second 774.