155/65R17 vs 175/60R17
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 | 155/65R17 | 175/60R17 | Change |
|---|---|---|---|
| Overall height | 24.9" | 25.3" | +1.3 % |
| Sidewall | 3.97" | 4.13" | +4.2 % |
| Section width | 155 mm | 175 mm | +12.9 % |
| Circumference | 78.3" | 79.4" | +1.3 % |
| Revs per mile | 809 | 798 | -1.3 % |
| Axle height | 12.47" | 12.63" | +4.3 mm |
| Approved rim width | 4–5.5" | 5–6" | overlap 5–5.5" |
Both are approved on a rim 5" to 5.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 155/65R17. Fit 175/60R17 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 10,134 on the road, so it under-counts by 134. At a true 70 mph the first turns 944 times a minute, the second 931.
What drivers reported
Nobody has filed a complaint naming 155/65R17. 175/60R17 carries 2.