275/70R16 vs 285/75R16

285/75R16 is 1.7" taller than 275/70R16 (5.4%)

Diameter difference+5.37%diameter 31.16" → 32.83"
275/70R16285/75R16
275/70R16285/75R16Difference
Overall diameter31.16"32.83"+1.67"
Section width10.83"11.22"+0.39"
Sidewall height7.58"8.42"+0.84"
Circumference97.9"103.1"+5.3"
Revolutions per mile647614−33
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph31.6 mph+1.6
45 mph47.4 mph+2.4
60 mph63.2 mph+3.2
70 mph73.8 mph+3.8
80 mph84.3 mph+4.3

Gear ratio to match

CurrentEquivalent
3.423.60
3.553.74
3.733.93
4.104.32

285/75R16 is 1.67" taller than 275/70R16, a +5.37% 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 0.84" (half the diameter change), and the tire needs 0.84" more room above it.

285/75R16 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 16" wheel; the sidewall is 0.84" taller on 285/75R16.

Details: 275/70R16 in inches · 285/75R16 in inches · change sizes in the calculator

FAQ

What is the difference between 275/70R16 and 285/75R16?

285/75R16 is 1.67" taller (+5.37%) and 0.39" wider than 275/70R16.

Will 285/75R16 change my speedometer?

Yes, by +5.37%. When the speedometer shows 60 mph you would be going 63.2 mph.

Can I replace 275/70R16 with 285/75R16?

It is a +5.4% diameter change, larger than the common 3% guideline, so check clearance and plan to recalibrate.