195/65R13 vs 205/60R13
Going from one to the other changes the overall height by -1.3 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 195/65R13 | 205/60R13 | Change |
|---|---|---|---|
| Overall height | 23.0" | 22.7" | -1.3 % |
| Sidewall | 4.99" | 4.84" | -3.0 % |
| Section width | 195 mm | 205 mm | +5.1 % |
| Circumference | 72.2" | 71.3" | -1.3 % |
| Revs per mile | 878 | 889 | +1.3 % |
| Axle height | 11.49" | 11.34" | -3.8 mm |
| Approved rim width | 5.5–7" | 5.5–7.5" | overlap 5.5–7" |
Both are approved on a rim 5.5" to 7" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 195/65R13. Fit 205/60R13 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.6 mph | -0.4 |
| 50 mph | 49.4 mph | -0.6 |
| 70 mph | 69.1 mph | -0.9 |
| 90 mph | 88.8 mph | -1.2 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,872 on the road, so it over-counts by 128. At a true 70 mph the first turns 1024 times a minute, the second 1037.