195/80R14 vs 195/75R14
Going from one to the other changes the overall height by -2.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 195/80R14 | 195/75R14 | Change |
|---|---|---|---|
| Overall height | 26.3" | 25.5" | -2.9 % |
| Sidewall | 6.14" | 5.76" | -6.3 % |
| Section width | 195 mm | 195 mm | 0.0 % |
| Circumference | 82.6" | 80.2" | -2.9 % |
| Revs per mile | 767 | 790 | +2.9 % |
| Axle height | 13.14" | 12.76" | -9.8 mm |
| Approved rim width | 5.5–7" | 5.5–7" | 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 195/80R14. Fit 195/75R14 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.1 mph | -0.9 |
| 50 mph | 48.5 mph | -1.5 |
| 70 mph | 68.0 mph | -2.0 |
| 90 mph | 87.4 mph | -2.6 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,708 on the road, so it over-counts by 292. At a true 70 mph the first turns 895 times a minute, the second 922.
What drivers reported
Nobody has filed a complaint naming 195/80R14. 195/75R14 carries 15.