245/70R16 vs 265/70R16

265/70R16 is 1.1" taller than 245/70R16 (3.7%)

Diameter difference+3.74%diameter 29.50" → 30.61"
245/70R16265/70R16
245/70R16265/70R16Difference
Overall diameter29.50"30.61"+1.10"
Section width9.65"10.43"+0.79"
Sidewall height6.75"7.30"+0.55"
Circumference92.7"96.2"+3.5"
Revolutions per mile684659−25
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph31.1 mph+1.1
45 mph46.7 mph+1.7
60 mph62.2 mph+2.2
70 mph72.6 mph+2.6
80 mph83.0 mph+3.0

Gear ratio to match

CurrentEquivalent
3.423.55
3.553.68
3.733.87
4.104.25

265/70R16 is 1.10" taller than 245/70R16, a +3.74% change in diameter. That is more than the 3% many tire shops use as a limit, so plan on recalibrating the speedometer and checking ABS and stability control.

Ground clearance changes by 0.55" (half the diameter change), and the tire needs 0.55" more room above it.

265/70R16 is 0.79" wider. On the same wheel offset about half of that, 0.39", moves toward the suspension and half toward the fender.

Both fit a 16" wheel; the sidewall is 0.55" taller on 265/70R16.

Details: 245/70R16 in inches · 265/70R16 in inches · change sizes in the calculator

FAQ

What is the difference between 245/70R16 and 265/70R16?

265/70R16 is 1.10" taller (+3.74%) and 0.79" wider than 245/70R16.

Will 265/70R16 change my speedometer?

Yes, by +3.74%. When the speedometer shows 60 mph you would be going 62.2 mph.

Can I replace 245/70R16 with 265/70R16?

It is a +3.7% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.