245/70R16 vs 265/70R16: full comparison
| Measurement | 245/70R16 | 265/70R16 | Difference |
|---|---|---|---|
| Diameter | 29.50 in | 30.61 in | +1.10 in+3.7% |
| Section width | 9.65 in | 10.43 in | +0.79 in+8.2% |
| Sidewall height | 6.75 in | 7.30 in | +0.55 in+8.2% |
| Circumference | 92.69 in | 96.15 in | +3.46 in+3.7% |
| Revs per mile | 684 | 659 | −25−3.6% |
Speedometer: indicated vs actual speed
With 265/70R16 fitted where 245/70R16 was the stock/calibrated size:
| Speedometer shows | Actual speed | Difference |
|---|---|---|
| 20 mph | 20.7 mph | +0.7 mph |
| 30 mph | 31.1 mph | +1.1 mph |
| 40 mph | 41.5 mph | +1.5 mph |
| 50 mph | 51.9 mph | +1.9 mph |
| 55 mph | 57.1 mph | +2.1 mph |
| 60 mph | 62.2 mph | +2.2 mph |
| 65 mph | 67.4 mph | +2.4 mph |
| 70 mph | 72.6 mph | +2.6 mph |
| 75 mph | 77.8 mph | +2.8 mph |
| 80 mph | 83.0 mph | +3.0 mph |
Recalculate for a gear ratio change too →
Will 265/70R16 fit where 245/70R16 was?
At +3.7%, 265/70R16 is enough larger than 245/70R16 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.
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- Speedometer calculator: true speed after a tire or gear ratio change.
Frequently asked questions
How much bigger is 265/70R16 than 245/70R16?
265/70R16 is 1.10 in taller in overall diameter (+3.7%) and 0.79 in wider in section width (+8.2%) than 245/70R16.
Will 265/70R16 fit in place of 245/70R16?
At +3.7%, 265/70R16 is enough larger than 245/70R16 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 265/70R16 affect my speedometer?
With 265/70R16 fitted where 245/70R16 was calibrated, an indicated 60 mph is really about 62.2 mph. Beyond the ±3% guideline, plan to recalibrate the speedometer/odometer (with a programmer or at the dealer) for an accurate reading.
Does 265/70R16 change the ride height?
Yes -- half the diameter difference shows up at the axle, so 265/70R16 changes ride height by about 0.55 in higher compared with 245/70R16.
Do 245/70R16 and 265/70R16 use the same wheel (rim) diameter?
Yes -- both fit a 16 inch wheel, so only the tire itself changes, not the wheel.