335/65R23 vs 355/65R23
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 | 335/65R23 | 355/65R23 | Change |
|---|---|---|---|
| Overall height | 40.1" | 41.2" | +2.5 % |
| Sidewall | 8.57" | 9.08" | +6.0 % |
| Section width | 335 mm | 355 mm | +6.0 % |
| Circumference | 126.1" | 129.3" | +2.5 % |
| Revs per mile | 502 | 490 | -2.5 % |
| Axle height | 20.07" | 20.58" | +13.0 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 335/65R23. Fit 355/65R23 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 | 92.3 mph | +2.3 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,255 on the road, so it under-counts by 255. At a true 70 mph the first turns 586 times a minute, the second 572.