195/40R16 vs 215/35R16
Going from one to the other changes the overall height by -1.0 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 195/40R16 | 215/35R16 | Change |
|---|---|---|---|
| Overall height | 22.1" | 21.9" | -1.0 % |
| Sidewall | 3.07" | 2.96" | -3.5 % |
| Section width | 195 mm | 215 mm | +10.3 % |
| Circumference | 69.6" | 68.9" | -1.0 % |
| Revs per mile | 911 | 920 | +1.0 % |
| Axle height | 11.07" | 10.96" | -2.8 mm |
| Approved rim width | 5.5–7" | 6–8" | overlap 6–7" |
Both are approved on a rim 6" to 7" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 195/40R16. Fit 215/35R16 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.7 mph | -0.3 |
| 50 mph | 49.5 mph | -0.5 |
| 70 mph | 69.3 mph | -0.7 |
| 90 mph | 89.1 mph | -0.9 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,902 on the road, so it over-counts by 98. At a true 70 mph the first turns 1063 times a minute, the second 1073.