155/70R16 vs 175/60R16
Going from one to the other changes the overall height by -1.1 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 155/70R16 | 175/60R16 | Change |
|---|---|---|---|
| Overall height | 24.5" | 24.3" | -1.1 % |
| Sidewall | 4.27" | 4.13" | -3.2 % |
| Section width | 155 mm | 175 mm | +12.9 % |
| Circumference | 77.1" | 76.2" | -1.1 % |
| Revs per mile | 822 | 831 | +1.1 % |
| Axle height | 12.27" | 12.13" | -3.5 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 155/70R16. Fit 175/60R16 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.7 mph | -0.3 |
| 50 mph | 49.4 mph | -0.6 |
| 70 mph | 69.2 mph | -0.8 |
| 90 mph | 89.0 mph | -1.0 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,888 on the road, so it over-counts by 112. At a true 70 mph the first turns 959 times a minute, the second 970.
What drivers reported
Nobody has filed a complaint naming 155/70R16. 175/60R16 carries 1.