275/75R16 vs 285/75R16

285/75R16 is 0.6" taller than 275/75R16 (1.8%)

Diameter difference+1.83%diameter 32.24" → 32.83"
275/75R16285/75R16
275/75R16285/75R16Difference
Overall diameter32.24"32.83"+0.59"
Section width10.83"11.22"+0.39"
Sidewall height8.12"8.42"+0.30"
Circumference101.3"103.1"+1.9"
Revolutions per mile626614−11
Wheel diameter16"16"±0"

Speedometer

ShowsActualDiff
30 mph30.5 mph+0.5
45 mph45.8 mph+0.8
60 mph61.1 mph+1.1
70 mph71.3 mph+1.3
80 mph81.5 mph+1.5

Gear ratio to match

CurrentEquivalent
3.423.48
3.553.62
3.733.80
4.104.18

285/75R16 is 0.59" taller than 275/75R16, a +1.83% change in diameter, inside the 3% range most shops treat as a safe swap.

Ground clearance changes by 0.30" (half the diameter change), and the tire needs 0.30" 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 0.30" taller on 285/75R16.

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

FAQ

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

285/75R16 is 0.59" taller (+1.83%) and 0.39" wider than 275/75R16.

Will 285/75R16 change my speedometer?

Yes, by +1.83%. When the speedometer shows 60 mph you would be going 61.1 mph.

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

Often yes: the diameter change of +1.8% is within the common 3% guideline. Check the load index, speed rating and clearance.