265/70R20 vs 275/60R20

265/70R20 is 1.6" taller than 275/60R20 (4.7%)

Diameter difference−4.66%diameter 34.61" → 32.99"
265/70R20275/60R20
265/70R20275/60R20Difference
Overall diameter34.61"32.99"−1.61"
Section width10.43"10.83"+0.39"
Sidewall height7.30"6.50"−0.81"
Circumference108.7"103.6"−5.1"
Revolutions per mile583611+29
Wheel diameter20"20"±0"

Speedometer

ShowsActualDiff
30 mph28.6 mph−1.4
45 mph42.9 mph−2.1
60 mph57.2 mph−2.8
70 mph66.7 mph−3.3
80 mph76.3 mph−3.7

Gear ratio to match

CurrentEquivalent
3.423.26
3.553.38
3.733.56
4.103.91

275/60R20 is 1.61" shorter than 265/70R20, a −4.66% 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 0.81" (half the diameter change), and the tire needs 0.81" 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 0.81" shorter on 275/60R20.

Details: 265/70R20 in inches · 275/60R20 in inches · change sizes in the calculator

FAQ

What is the difference between 265/70R20 and 275/60R20?

275/60R20 is 1.61" shorter (−4.66%) and 0.39" wider than 265/70R20.

Will 275/60R20 change my speedometer?

Yes, by −4.66%. When the speedometer shows 60 mph you would be going 57.2 mph.

Can I replace 265/70R20 with 275/60R20?

It is a −4.7% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.