265/60R20 vs 275/60R20

275/60R20 is 0.5" taller than 265/60R20 (1.5%)

Diameter difference+1.45%diameter 32.52" → 32.99"
265/60R20275/60R20
265/60R20275/60R20Difference
Overall diameter32.52"32.99"+0.47"
Section width10.43"10.83"+0.39"
Sidewall height6.26"6.50"+0.24"
Circumference102.2"103.6"+1.5"
Revolutions per mile620611−9
Wheel diameter20"20"±0"

Speedometer

ShowsActualDiff
30 mph30.4 mph+0.4
45 mph45.7 mph+0.7
60 mph60.9 mph+0.9
70 mph71.0 mph+1.0
80 mph81.2 mph+1.2

Gear ratio to match

CurrentEquivalent
3.423.47
3.553.60
3.733.78
4.104.16

275/60R20 is 0.47" taller than 265/60R20, a +1.45% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.24" (half the diameter change), and the tire needs 0.24" more room above it.

275/60R20 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 20" wheel; the sidewall is 0.24" taller on 275/60R20.

Details: 265/60R20 in inches · 275/60R20 in inches · change sizes in the calculator

FAQ

What is the difference between 265/60R20 and 275/60R20?

275/60R20 is 0.47" taller (+1.45%) and 0.39" wider than 265/60R20.

Will 275/60R20 change my speedometer?

Yes, by +1.45%. When the speedometer shows 60 mph you would be going 60.9 mph.

Can I replace 265/60R20 with 275/60R20?

Often yes: the diameter change of +1.5% is within the common 3% guideline. Check the load index, speed rating and clearance.