Tire Size Box

215/75R14 vs 215/85R14

215/85R14 compared with 215/75R14

+6.3% diameter, 0.0" width

215/85R14 is 28.39" tall vs 26.70". More than the 3% rule of thumb, so check carefully before switching.

26.7"14" rim6.3"8.5" wide
215/75R14 (solid) compared with 215/85R14 (dashed outline), drawn to scale

With 215/85R14 tires, when your speedometer says 60 mph you are really going

63.8 mph

215/85R14 is +1.69 inches (+6.3%) in overall diameter. That is more than the 3% most shops and makers recommend.

215/75R14215/85R14Difference%
Overall diameter26.70"28.39"+1.69"+6.3%
Section width8.46"8.46"0.00"0.0%
Sidewall height6.35"7.19"+0.85"+13.3%
Circumference83.87"89.19"+5.32"+6.3%
Revolutions per mile755.4710.4−45.0−6.0%

Speedometer difference

If your vehicle came with 215/75R14 and you fit 215/85R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.3 mph+1.3 mph
30 mph31.9 mph+1.9 mph
40 mph42.5 mph+2.5 mph
50 mph53.2 mph+3.2 mph
60 mph63.8 mph+3.8 mph
65 mph69.1 mph+4.1 mph
70 mph74.4 mph+4.4 mph
75 mph79.8 mph+4.8 mph
80 mph85.1 mph+5.1 mph

Each size on its own

Questions

Which is bigger, 215/75R14 or 215/85R14?
215/85R14 is taller by 1.69 inches (28.39" vs 26.70"). 215/75R14 is the same width.
Can I replace 215/75R14 with 215/85R14?
It is not recommended without checking carefully. The diameter difference is +6.3%, 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 215/85R14 change my speedometer?
When your speedometer reads 60 mph with 215/85R14 fitted (calibrated for 215/75R14), your real speed is 63.8 mph. Your odometer will under-count miles by about 6.3%.
Will 215/85R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.85 inches of ground clearance at the axle.

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