355/30R24 vs 335/35R24
Going from one to the other changes the overall height by +2.6 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 355/30R24 | 335/35R24 | Change |
|---|---|---|---|
| Overall height | 32.4" | 33.2" | +2.6 % |
| Sidewall | 4.19" | 4.62" | +10.1 % |
| Section width | 355 mm | 335 mm | -5.6 % |
| Circumference | 101.7" | 104.4" | +2.6 % |
| Revs per mile | 623 | 607 | -2.6 % |
| Axle height | 16.19" | 16.62" | +10.8 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 355/30R24. Fit 335/35R24 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.8 mph | +0.8 |
| 50 mph | 51.3 mph | +1.3 |
| 70 mph | 71.8 mph | +1.8 |
| 90 mph | 92.4 mph | +2.4 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,261 on the road, so it under-counts by 261. At a true 70 mph the first turns 727 times a minute, the second 708.