245/75R16 vs 265/75R16: full comparison
| Measurement | 245/75R16 | 265/75R16 | Difference |
|---|---|---|---|
| Diameter | 30.47 in | 31.65 in | +1.18 in+3.9% |
| Section width | 9.65 in | 10.43 in | +0.79 in+8.2% |
| Sidewall height | 7.23 in | 7.82 in | +0.59 in+8.2% |
| Circumference | 95.72 in | 99.43 in | +3.71 in+3.9% |
| Revs per mile | 662 | 637 | −25−3.7% |
Speedometer: indicated vs actual speed
With 265/75R16 fitted where 245/75R16 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 20.8 mph | +0.8 mph |
| 30 mph | 31.2 mph | +1.2 mph |
| 40 mph | 41.6 mph | +1.6 mph |
| 50 mph | 51.9 mph | +1.9 mph |
| 55 mph | 57.1 mph | +2.1 mph |
| 60 mph | 62.3 mph | +2.3 mph |
| 65 mph | 67.5 mph | +2.5 mph |
| 70 mph | 72.7 mph | +2.7 mph |
| 75 mph | 77.9 mph | +2.9 mph |
| 80 mph | 83.1 mph | +3.1 mph |
Recalculate for a gear ratio change too →
Will 265/75R16 fit where 245/75R16 was?
At +3.9%, 265/75R16 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
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 265/75R16 than 245/75R16?
265/75R16 is 1.18 in taller in overall diameter (+3.9%) and 0.79 in wider in section width (+8.2%) than 245/75R16.
Will 265/75R16 fit in place of 245/75R16?
At +3.9%, 265/75R16 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 265/75R16 affect my speedometer?
With 265/75R16 fitted where 245/75R16 was calibrated, an indicated 60 mph is really about 62.3 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
Does 265/75R16 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 265/75R16 changes ride height by about 0.59 in higher compared with 245/75R16.
Do 245/75R16 and 265/75R16 use the same wheel (rim) diameter?
Yes -- both fit a 16 inch wheel, so only the tire itself changes, not the wheel.