355/60R23 vs 335/65R23
Going from one to the other changes the overall height by +0.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 355/60R23 | 335/65R23 | Change |
|---|---|---|---|
| Overall height | 39.8" | 40.1" | +0.9 % |
| Sidewall | 8.39" | 8.57" | +2.2 % |
| Section width | 355 mm | 335 mm | -5.6 % |
| Circumference | 124.9" | 126.1" | +0.9 % |
| Revs per mile | 507 | 502 | -0.9 % |
| Axle height | 19.89" | 20.07" | +4.8 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 355/60R23. Fit 335/65R23 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.3 mph | +0.3 |
| 50 mph | 50.5 mph | +0.5 |
| 70 mph | 70.7 mph | +0.7 |
| 90 mph | 90.8 mph | +0.8 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,094 on the road, so it under-counts by 94. At a true 70 mph the first turns 592 times a minute, the second 586.