Tire Size Box

285/60R16 vs 285/70R16

285/70R16 compared with 285/60R16

+7.6% diameter, 0.0" width

285/70R16 is 31.71" tall vs 29.46". More than the 3% rule of thumb, so check carefully before switching.

29.5"16" rim6.7"11.2" wide
285/60R16 (solid) compared with 285/70R16 (dashed outline), drawn to scale

With 285/70R16 tires, when your speedometer says 60 mph you are really going

64.6 mph

285/70R16 is +2.24 inches (+7.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

285/60R16285/70R16Difference%
Overall diameter29.46"31.71"+2.24"+7.6%
Section width11.22"11.22"0.00"0.0%
Sidewall height6.73"7.85"+1.12"+16.7%
Circumference92.57"99.62"+7.05"+7.6%
Revolutions per mile684.5636.0−48.4−7.1%

Speedometer difference

If your vehicle came with 285/60R16 and you fit 285/70R16, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.5 mph+1.5 mph
30 mph32.3 mph+2.3 mph
40 mph43.0 mph+3.0 mph
50 mph53.8 mph+3.8 mph
60 mph64.6 mph+4.6 mph
65 mph70.0 mph+5.0 mph
70 mph75.3 mph+5.3 mph
75 mph80.7 mph+5.7 mph
80 mph86.1 mph+6.1 mph

Each size on its own

Questions

Which is bigger, 285/60R16 or 285/70R16?
285/70R16 is taller by 2.24 inches (31.71" vs 29.46"). 285/60R16 is the same width.
Can I replace 285/60R16 with 285/70R16?
It is not recommended without checking carefully. The diameter difference is +7.6%, 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 285/70R16 change my speedometer?
When your speedometer reads 60 mph with 285/70R16 fitted (calibrated for 285/60R16), your real speed is 64.6 mph. Your odometer will under-count miles by about 7.6%.
Will 285/70R16 lift my vehicle?
Ride height changes by half the diameter difference: +1.12 inches of ground clearance at the axle.

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