Tire Size Box

265/65R19 vs 285/65R19

285/65R19 compared with 265/65R19

+3.1% diameter, +0.8" width

285/65R19 is 33.59" tall vs 32.56". More than the 3% rule of thumb, so check carefully before switching.

32.6"19" rim6.8"10.4" wide
265/65R19 (solid) compared with 285/65R19 (dashed outline), drawn to scale

With 285/65R19 tires, when your speedometer says 60 mph you are really going

61.9 mph

285/65R19 is +1.02 inches (+3.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

265/65R19285/65R19Difference%
Overall diameter32.56"33.59"+1.02"+3.1%
Section width10.43"11.22"+0.79"+7.5%
Sidewall height6.78"7.29"+0.51"+7.5%
Circumference102.30"105.52"+3.22"+3.1%
Revolutions per mile619.4600.5−18.9−3.0%

Speedometer difference

If your vehicle came with 265/65R19 and you fit 285/65R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.6 mph+0.6 mph
30 mph30.9 mph+0.9 mph
40 mph41.3 mph+1.3 mph
50 mph51.6 mph+1.6 mph
60 mph61.9 mph+1.9 mph
65 mph67.0 mph+2.0 mph
70 mph72.2 mph+2.2 mph
75 mph77.4 mph+2.4 mph
80 mph82.5 mph+2.5 mph

Each size on its own

Questions

Which is bigger, 265/65R19 or 285/65R19?
285/65R19 is taller by 1.02 inches (33.59" vs 32.56"). 285/65R19 is wider by 0.79 inches.
Can I replace 265/65R19 with 285/65R19?
It is not recommended without checking carefully. The diameter difference is +3.1%, 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 285/65R19 change my speedometer?
When your speedometer reads 60 mph with 285/65R19 fitted (calibrated for 265/65R19), your real speed is 61.9 mph. Your odometer will under-count miles by about 3.1%.
Will 285/65R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.51 inches of ground clearance at the axle.

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