315/40R24 vs 335/35R24
Going from one to the other changes the overall height by -2.0 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 315/40R24 | 335/35R24 | Change |
|---|---|---|---|
| Overall height | 33.9" | 33.2" | -2.0 % |
| Sidewall | 4.96" | 4.62" | -6.9 % |
| Section width | 315 mm | 335 mm | +6.3 % |
| Circumference | 106.6" | 104.4" | -2.0 % |
| Revs per mile | 595 | 607 | +2.0 % |
| Axle height | 16.96" | 16.62" | -8.8 mm |
| Approved rim width | 8.5–11.5" | 9.5–12.5" | overlap 9.5–11.5" |
Both are approved on a rim 9.5" to 11.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 315/40R24. Fit 335/35R24 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 | 88.2 mph | -1.8 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,797 on the road, so it over-counts by 203. At a true 70 mph the first turns 694 times a minute, the second 708.