175/70R17 vs 195/65R17
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 | 175/70R17 | 195/65R17 | Change |
|---|---|---|---|
| Overall height | 26.6" | 27.0" | +1.3 % |
| Sidewall | 4.82" | 4.99" | +3.5 % |
| Section width | 175 mm | 195 mm | +11.4 % |
| Circumference | 83.7" | 84.8" | +1.3 % |
| Revs per mile | 757 | 748 | -1.3 % |
| Axle height | 13.32" | 13.49" | +4.3 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 175/70R17. Fit 195/65R17 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.4 mph | +0.4 |
| 50 mph | 50.6 mph | +0.6 |
| 70 mph | 70.9 mph | +0.9 |
| 90 mph | 91.1 mph | +1.1 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,126 on the road, so it under-counts by 126. At a true 70 mph the first turns 883 times a minute, the second 872.
What drivers reported
Nobody has filed a complaint naming 175/70R17. 195/65R17 carries 2.