215/55R15 vs 195/60R15
Going from one to the other changes the overall height by -0.4 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 215/55R15 | 195/60R15 | Change |
|---|---|---|---|
| Overall height | 24.3" | 24.2" | -0.4 % |
| Sidewall | 4.66" | 4.61" | -1.1 % |
| Section width | 215 mm | 195 mm | -9.3 % |
| Circumference | 76.4" | 76.1" | -0.4 % |
| Revs per mile | 830 | 833 | +0.4 % |
| Axle height | 12.16" | 12.11" | -1.3 mm |
| Approved rim width | 6–8" | 5.5–7" | 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 215/55R15. Fit 195/60R15 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.9 mph | -0.1 |
| 50 mph | 49.8 mph | -0.2 |
| 70 mph | 69.7 mph | -0.3 |
| 90 mph | 89.6 mph | -0.4 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,960 on the road, so it over-counts by 40. At a true 70 mph the first turns 968 times a minute, the second 972.
What drivers reported
Nobody has filed a complaint naming 215/55R15. 195/60R15 carries 132.