265/65R20 vs 275/60R20

265/65R20 is 0.6" taller than 275/60R20 (1.7%)

Diameter difference−1.70%diameter 33.56" → 32.99"
265/65R20275/60R20
265/65R20275/60R20Difference
Overall diameter33.56"32.99"−0.57"
Section width10.43"10.83"+0.39"
Sidewall height6.78"6.50"−0.29"
Circumference105.4"103.6"−1.8"
Revolutions per mile601611+10
Wheel diameter20"20"±0"

Speedometer

ShowsActualDiff
30 mph29.5 mph−0.5
45 mph44.2 mph−0.8
60 mph59.0 mph−1.0
70 mph68.8 mph−1.2
80 mph78.6 mph−1.4

Gear ratio to match

CurrentEquivalent
3.423.36
3.553.49
3.733.67
4.104.03

275/60R20 is 0.57" shorter than 265/65R20, a −1.70% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.29" (half the diameter change), and the tire needs 0.29" less 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 0.29" shorter on 275/60R20.

Details: 265/65R20 in inches · 275/60R20 in inches · change sizes in the calculator

FAQ

What is the difference between 265/65R20 and 275/60R20?

275/60R20 is 0.57" shorter (−1.70%) and 0.39" wider than 265/65R20.

Will 275/60R20 change my speedometer?

Yes, by −1.70%. When the speedometer shows 60 mph you would be going 59.0 mph.

Can I replace 265/65R20 with 275/60R20?

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