245/70R16 vs 245/75R16

245/75R16 is 1.0" taller than 245/70R16 (3.3%)

Diameter difference+3.27%diameter 29.50" → 30.47"
245/70R16245/75R16
245/70R16245/75R16Difference
Overall diameter29.50"30.47"+0.96"
Section width9.65"9.65"±0.00"
Sidewall height6.75"7.23"+0.48"
Circumference92.7"95.7"+3.0"
Revolutions per mile684662−22
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph31.0 mph+1.0
45 mph46.5 mph+1.5
60 mph62.0 mph+2.0
70 mph72.3 mph+2.3
80 mph82.6 mph+2.6

Gear ratio to match

CurrentEquivalent
3.423.53
3.553.67
3.733.85
4.104.23

245/75R16 is 0.96" taller than 245/70R16, a +3.27% 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 0.48" (half the diameter change), and the tire needs 0.48" more room above it.

Both tires are the same width, 9.65".

Both fit a 16" wheel; the sidewall is 0.48" taller on 245/75R16.

Details: 245/70R16 in inches · 245/75R16 in inches · change sizes in the calculator

FAQ

What is the difference between 245/70R16 and 245/75R16?

245/75R16 is 0.96" taller (+3.27%) and 0.00" wider than 245/70R16.

Will 245/75R16 change my speedometer?

Yes, by +3.27%. When the speedometer shows 60 mph you would be going 62.0 mph.

Can I replace 245/70R16 with 245/75R16?

It is a +3.3% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.