285/70R17 vs 285/75R16: full comparison
| Measurement | 285/70R17 | 285/75R16 | Difference |
|---|---|---|---|
| Diameter | 32.71 in | 32.83 in | +0.12 in+0.4% |
| Section width | 11.22 in | 11.22 in | 0.00 in0.0% |
| Sidewall height | 7.85 in | 8.42 in | +0.56 in+7.1% |
| Circumference | 102.76 in | 103.14 in | +0.38 in+0.4% |
| Revs per mile | 617 | 614 | −2−0.4% |
Speedometer: indicated vs actual speed
With 285/75R16 fitted where 285/70R17 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 20.1 mph | +0.1 mph |
| 30 mph | 30.1 mph | +0.1 mph |
| 40 mph | 40.1 mph | +0.1 mph |
| 50 mph | 50.2 mph | +0.2 mph |
| 55 mph | 55.2 mph | +0.2 mph |
| 60 mph | 60.2 mph | +0.2 mph |
| 65 mph | 65.2 mph | +0.2 mph |
| 70 mph | 70.3 mph | +0.3 mph |
| 75 mph | 75.3 mph | +0.3 mph |
| 80 mph | 80.3 mph | +0.3 mph |
Recalculate for a gear ratio change too →
Will 285/75R16 fit where 285/70R17 was?
285/70R17 and 285/75R16 are essentially the same overall height (+0.4%), so this is usually a straightforward swap as far as fitment goes -- the main thing to check is wheel width and offset, not diameter.
Related tire size comparisons
- 265/70R17 vs 285/70R17
- 265/75R16 vs 285/75R16
- 285/75R16 vs 305/70R16
- 255/85R16 vs 285/75R16
- 285/75R16 vs 315/75R16
More tire tools
- Tire size comparison tool: compare any two sizes yourself, including flotation sizes.
- Tire size calculator: full dimensions of one size, plus every equivalent size within 3%.
- Speedometer calculator: true speed after a tire or gear ratio change.
Frequently asked questions
How much bigger is 285/75R16 than 285/70R17?
285/75R16 is 0.12 in taller in overall diameter (+0.4%) and 0.00 in the same width as in section width (0.0%) than 285/70R17.
Will 285/75R16 fit in place of 285/70R17?
285/70R17 and 285/75R16 are essentially the same overall height (+0.4%), so this is usually a straightforward swap as far as fitment goes -- the main thing to check is wheel width and offset, not diameter.
Does swapping to 285/75R16 affect my speedometer?
With 285/75R16 fitted where 285/70R17 was calibrated, an indicated 60 mph is really about 60.2 mph. That small a difference is within the ±3% most shops treat as close enough not to recalibrate.
Does 285/75R16 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 285/75R16 changes ride height by about 0.06 in higher compared with 285/70R17.
Do 285/70R17 and 285/75R16 use the same wheel (rim) diameter?
No -- 285/70R17 needs a 17 inch wheel and 285/75R16 needs a 16 inch wheel, so this comparison also assumes (or requires) a wheel change.