355/45R24 vs 335/45R24
Going from one to the other changes the overall height by -1.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 355/45R24 | 335/45R24 | Change |
|---|---|---|---|
| Overall height | 36.6" | 35.9" | -1.9 % |
| Sidewall | 6.29" | 5.94" | -5.6 % |
| Section width | 355 mm | 335 mm | -5.6 % |
| Circumference | 114.9" | 112.7" | -1.9 % |
| Revs per mile | 551 | 562 | +1.9 % |
| Axle height | 18.29" | 17.94" | -9.0 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 355/45R24. Fit 335/45R24 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.4 mph | -0.6 |
| 50 mph | 49.0 mph | -1.0 |
| 70 mph | 68.6 mph | -1.4 |
| 90 mph | 88.3 mph | -1.7 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,806 on the road, so it over-counts by 194. At a true 70 mph the first turns 643 times a minute, the second 656.