245/70R16 vs 265/70R16
265/70R16 is outside the ±3% rule as a replacement for 245/70R16: the diameter differs by +3.74%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 265/70R16 on a car calibrated for 245/70R16, the speedometer reads 57.8 mph when you're really doing 60, and the odometer under-counts by 3.7%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.1 mph |
| 45 mph | 46.7 mph |
| 60 mph | 62.2 mph |
| 70 mph | 72.6 mph |
| 80 mph | 83.0 mph |
Other sizes close to 245/70R16
Questions
Can I replace 245/70R16 with 265/70R16?
265/70R16 is outside the ±3% rule as a replacement for 245/70R16: the diameter differs by +3.74%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 245/70R16 and 265/70R16?
265/70R16 is 1.10" taller and 20 mm wider; the sidewall is +0.55". At an indicated 60 mph you'd actually be doing 62.2 mph.
Will 265/70R16 fit on 245/70R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 265 mm tire and the fender clearance.