265/70R15 vs 265/75R15

265/75R15 is 1.0" taller than 265/70R15 (3.5%)

Diameter difference+3.52%diameter 29.61" → 30.65"
265/70R15265/75R15
265/70R15265/75R15Difference
Overall diameter29.61"30.65"+1.04"
Section width10.43"10.43"±0.00"
Sidewall height7.30"7.82"+0.52"
Circumference93.0"96.3"+3.3"
Revolutions per mile681658−23
Wheel diameter15"15"±0"

Speedometer

ShowsActualDiff
30 mph31.1 mph+1.1
45 mph46.6 mph+1.6
60 mph62.1 mph+2.1
70 mph72.5 mph+2.5
80 mph82.8 mph+2.8

Gear ratio to match

CurrentEquivalent
3.423.54
3.553.68
3.733.86
4.104.24

265/75R15 is 1.04" taller than 265/70R15, a +3.52% 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 0.52" (half the diameter change), and the tire needs 0.52" more room above it.

Both tires are the same width, 10.43".

Both fit a 15" wheel; the sidewall is 0.52" taller on 265/75R15.

Details: 265/70R15 in inches · 265/75R15 in inches · change sizes in the calculator

FAQ

What is the difference between 265/70R15 and 265/75R15?

265/75R15 is 1.04" taller (+3.52%) and 0.00" wider than 265/70R15.

Will 265/75R15 change my speedometer?

Yes, by +3.52%. When the speedometer shows 60 mph you would be going 62.1 mph.

Can I replace 265/70R15 with 265/75R15?

It is a +3.5% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.