175/75R14 vs 195/70R14
Going from one to the other changes the overall height by +1.7 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 175/75R14 | 195/70R14 | Change |
|---|---|---|---|
| Overall height | 24.3" | 24.7" | +1.7 % |
| Sidewall | 5.17" | 5.37" | +4.0 % |
| Section width | 175 mm | 195 mm | +11.4 % |
| Circumference | 76.4" | 77.7" | +1.7 % |
| Revs per mile | 829 | 815 | -1.7 % |
| Axle height | 12.17" | 12.37" | +5.3 mm |
| Approved rim width | 5–6" | 5.5–7" | overlap 5.5–6" |
Both are approved on a rim 5.5" to 6" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 175/75R14. Fit 195/70R14 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.5 mph | +0.5 |
| 50 mph | 50.8 mph | +0.8 |
| 70 mph | 71.2 mph | +1.2 |
| 90 mph | 91.5 mph | +1.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,170 on the road, so it under-counts by 170. At a true 70 mph the first turns 967 times a minute, the second 951.
What drivers reported
Nobody has filed a complaint naming 175/75R14. 195/70R14 carries 45.