235/75R15 vs 245/75R16 Side-by-side tire size comparison with specs and compatibility
This tire swap exceeds 5% diameter difference. Not recommended without suspension modifications. Will significantly affect speedometer, ABS, and may cause rubbing.
Full Specifications Comparison
| Specification | 235/75R15 | 245/75R16 | Difference |
|---|---|---|---|
| Overall Diameter | 733.5 mm (28.9") | 773.9 mm (30.5") | +40.4 mm |
| Section Width | 235 mm (9.3") | 245 mm (9.6") | +10 mm |
| Sidewall Height | 176.3 mm | 183.8 mm | +7.5 mm |
| Circumference | 2304.4 mm | 2431.3 mm | +126.9 mm |
| Revolutions/Mile | 698 | 662 | -36 |
| Aspect Ratio | 75% | 75% | 0% |
| Rim Diameter | 15" | 16" | +1" |
Key Impact Summary
Speedometer Correction Table
When switching from 235/75R15 to 245/75R16, your speedometer will under-read. Here is the correction at common speeds:
| Speedometer Shows | Actual Speed (mph) | Difference |
|---|---|---|
| 30 mph | 31.7 mph | +1.7 mph |
| 40 mph | 42.2 mph | +2.2 mph |
| 50 mph | 52.8 mph | +2.8 mph |
| 60 mph | 63.3 mph | +3.3 mph |
| 70 mph | 73.9 mph | +3.9 mph |
| 80 mph | 84.4 mph | +4.4 mph |
| 90 mph | 95 mph | +5 mph |
| 100 mph | 105.5 mph | +5.5 mph |
| 110 mph | 116.1 mph | +6.1 mph |
| 120 mph | 126.6 mph | +6.6 mph |
What This Swap Means
Wider tires (245/75R16): The 10mm wider contact patch provides better grip in dry conditions and improved cornering stability. However, wider tires increase rolling resistance slightly, which may affect fuel economy by 1-2%. They are also more susceptible to hydroplaning in wet conditions.
Taller sidewall: The 7.5mm increase in sidewall height provides a more comfortable ride by absorbing more road imperfections. Taller sidewalls also offer better protection against pothole damage to wheels. The trade-off is slightly less responsive steering feel.
Ground clearance: Increases by 20.2mm, providing slightly better approach angles for off-road driving and speed bump clearance.