245/75R16 vs 285/75R16: full comparison
| Measurement | 245/75R16 | 285/75R16 | Difference |
|---|---|---|---|
| Diameter | 30.47 in | 32.83 in | +2.36 in+7.8% |
| Section width | 9.65 in | 11.22 in | +1.57 in+16.3% |
| Sidewall height | 7.23 in | 8.42 in | +1.18 in+16.3% |
| Circumference | 95.72 in | 103.14 in | +7.42 in+7.8% |
| Revs per mile | 662 | 614 | −48−7.2% |
Speedometer: indicated vs actual speed
With 285/75R16 fitted where 245/75R16 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 21.6 mph | +1.6 mph |
| 30 mph | 32.3 mph | +2.3 mph |
| 40 mph | 43.1 mph | +3.1 mph |
| 50 mph | 53.9 mph | +3.9 mph |
| 55 mph | 59.3 mph | +4.3 mph |
| 60 mph | 64.7 mph | +4.7 mph |
| 65 mph | 70.0 mph | +5.0 mph |
| 70 mph | 75.4 mph | +5.4 mph |
| 75 mph | 80.8 mph | +5.8 mph |
| 80 mph | 86.2 mph | +6.2 mph |
Recalculate for a gear ratio change too →
Will 285/75R16 fit where 245/75R16 was?
At +7.8%, 285/75R16 is enough larger than 245/75R16 that it commonly needs some accommodation -- trimming plastic liners/fender edges, a spacer, or a leveling kit on trucks/SUVs going bigger. Check clearance at full steering lock and full suspension compression before buying.
Related tire size comparisons
- 265/75R16 vs 285/75R16
- 285/75R16 vs 305/70R16
- 255/85R16 vs 285/75R16
- 285/75R16 vs 315/75R16
- 285/70R17 vs 285/75R16
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 245/75R16?
285/75R16 is 2.36 in taller in overall diameter (+7.8%) and 1.57 in wider in section width (+16.3%) than 245/75R16.
Will 285/75R16 fit in place of 245/75R16?
At +7.8%, 285/75R16 is enough larger than 245/75R16 that it commonly needs some accommodation -- trimming plastic liners/fender edges, a spacer, or a leveling kit on trucks/SUVs going bigger. Check clearance at full steering lock and full suspension compression before buying.
Does swapping to 285/75R16 affect my speedometer?
With 285/75R16 fitted where 245/75R16 was calibrated, an indicated 60 mph is really about 64.7 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
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 1.18 in higher compared with 245/75R16.
Do 245/75R16 and 285/75R16 use the same wheel (rim) diameter?
Yes -- both fit a 16 inch wheel, so only the tire itself changes, not the wheel.