195/65R17 vs 175/75R17
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 | 195/65R17 | 175/75R17 | Change |
|---|---|---|---|
| Overall height | 27.0" | 27.3" | +1.3 % |
| Sidewall | 4.99" | 5.17" | +3.6 % |
| Section width | 195 mm | 175 mm | -10.3 % |
| Circumference | 84.8" | 85.9" | +1.3 % |
| Revs per mile | 748 | 738 | -1.3 % |
| Axle height | 13.49" | 13.67" | +4.5 mm |
| Approved rim width | 5.5–7" | 5–6" | 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 195/65R17. Fit 175/75R17 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.4 mph | +0.4 |
| 50 mph | 50.7 mph | +0.7 |
| 70 mph | 70.9 mph | +0.9 |
| 90 mph | 91.2 mph | +1.2 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,131 on the road, so it under-counts by 131. At a true 70 mph the first turns 872 times a minute, the second 861.
What drivers reported
195/65R17 carries 2 complaints. Nobody has filed one naming 175/75R17.