135/80R16 vs 145/80R16
Going from one to the other changes the overall height by +2.6 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 135/80R16 | 145/80R16 | Change |
|---|---|---|---|
| Overall height | 24.5" | 25.1" | +2.6 % |
| Sidewall | 4.25" | 4.57" | +7.4 % |
| Section width | 135 mm | 145 mm | +7.4 % |
| Circumference | 77.0" | 79.0" | +2.6 % |
| Revs per mile | 823 | 802 | -2.6 % |
| Axle height | 12.25" | 12.57" | +8.0 mm |
| Approved rim width | 3.5–5" | 4–5.5" | overlap 4–5" |
Both are approved on a rim 4" to 5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 135/80R16. Fit 145/80R16 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.8 mph | +0.8 |
| 50 mph | 51.3 mph | +1.3 |
| 70 mph | 71.8 mph | +1.8 |
| 90 mph | 92.3 mph | +2.3 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,257 on the road, so it under-counts by 257. At a true 70 mph the first turns 960 times a minute, the second 936.
What drivers reported
Nobody has filed a complaint naming 135/80R16. 145/80R16 carries 1.