265/70R17 vs 275/70R17

275/70R17 is 0.6" taller than 265/70R17 (1.7%)

Diameter difference+1.74%diameter 31.61" → 32.16"
265/70R17275/70R17
265/70R17275/70R17Difference
Overall diameter31.61"32.16"+0.55"
Section width10.43"10.83"+0.39"
Sidewall height7.30"7.58"+0.28"
Circumference99.3"101.0"+1.7"
Revolutions per mile638627−11
Wheel diameter17"17"±0"

Speedometer

ShowsActualDiff
30 mph30.5 mph+0.5
45 mph45.8 mph+0.8
60 mph61.0 mph+1.0
70 mph71.2 mph+1.2
80 mph81.4 mph+1.4

Gear ratio to match

CurrentEquivalent
3.423.48
3.553.61
3.733.80
4.104.17

275/70R17 is 0.55" taller than 265/70R17, a +1.74% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.28" (half the diameter change), and the tire needs 0.28" more room above it.

275/70R17 is 0.39" wider. On the same wheel offset about half of that, 0.20", moves toward the suspension and half toward the fender.

Both fit a 17" wheel; the sidewall is 0.28" taller on 275/70R17.

Details: 265/70R17 in inches · 275/70R17 in inches · change sizes in the calculator

FAQ

What is the difference between 265/70R17 and 275/70R17?

275/70R17 is 0.55" taller (+1.74%) and 0.39" wider than 265/70R17.

Will 275/70R17 change my speedometer?

Yes, by +1.74%. When the speedometer shows 60 mph you would be going 61.0 mph.

Can I replace 265/70R17 with 275/70R17?

Often yes: the diameter change of +1.7% is within the common 3% guideline. Check the load index, speed rating and clearance.