Tire Size Box

265/75R16 vs 285/75R16

285/75R16 compared with 265/75R16

+3.7% diameter, +0.8" width

285/75R16 is 32.83" tall vs 31.65". More than the 3% rule of thumb, so check carefully before switching.

31.6"16" rim7.8"10.4" wide
265/75R16 (solid) compared with 285/75R16 (dashed outline), drawn to scale

With 285/75R16 tires, when your speedometer says 60 mph you are really going

62.2 mph

285/75R16 is +1.18 inches (+3.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

265/75R16285/75R16Difference%
Overall diameter31.65"32.83"+1.18"+3.7%
Section width10.43"11.22"+0.79"+7.5%
Sidewall height7.82"8.42"+0.59"+7.5%
Circumference99.43"103.14"+3.71"+3.7%
Revolutions per mile637.2614.3−22.9−3.6%

Speedometer difference

If your vehicle came with 265/75R16 and you fit 285/75R16, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.5 mph+1.5 mph
50 mph51.9 mph+1.9 mph
60 mph62.2 mph+2.2 mph
65 mph67.4 mph+2.4 mph
70 mph72.6 mph+2.6 mph
75 mph77.8 mph+2.8 mph
80 mph83.0 mph+3.0 mph

Each size on its own

Questions

Which is bigger, 265/75R16 or 285/75R16?
285/75R16 is taller by 1.18 inches (32.83" vs 31.65"). 285/75R16 is wider by 0.79 inches.
Can I replace 265/75R16 with 285/75R16?
It is not recommended without checking carefully. The diameter difference is +3.7%, more than the 3% most shops and makers allow. It will throw off the speedometer and may affect ABS, stability control and clearance.
How much will 285/75R16 change my speedometer?
When your speedometer reads 60 mph with 285/75R16 fitted (calibrated for 265/75R16), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.7%.
Will 285/75R16 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

Other comparisons