Tire Size Box

205/85R14 vs 225/85R14

225/85R14 compared with 205/85R14

+4.8% diameter, +0.8" width

225/85R14 is 29.06" tall vs 27.72". More than the 3% rule of thumb, so check carefully before switching.

27.7"14" rim6.9"8.1" wide
205/85R14 (solid) compared with 225/85R14 (dashed outline), drawn to scale

With 225/85R14 tires, when your speedometer says 60 mph you are really going

62.9 mph

225/85R14 is +1.34 inches (+4.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/85R14225/85R14Difference%
Overall diameter27.72"29.06"+1.34"+4.8%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height6.86"7.53"+0.67"+9.8%
Circumference87.09"91.29"+4.21"+4.8%
Revolutions per mile727.6694.0−33.5−4.6%

Speedometer difference

If your vehicle came with 205/85R14 and you fit 225/85R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.0 mph+1.0 mph
30 mph31.4 mph+1.4 mph
40 mph41.9 mph+1.9 mph
50 mph52.4 mph+2.4 mph
60 mph62.9 mph+2.9 mph
65 mph68.1 mph+3.1 mph
70 mph73.4 mph+3.4 mph
75 mph78.6 mph+3.6 mph
80 mph83.9 mph+3.9 mph

Each size on its own

Questions

Which is bigger, 205/85R14 or 225/85R14?
225/85R14 is taller by 1.34 inches (29.06" vs 27.72"). 225/85R14 is wider by 0.79 inches.
Can I replace 205/85R14 with 225/85R14?
It is not recommended without checking carefully. The diameter difference is +4.8%, 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 225/85R14 change my speedometer?
When your speedometer reads 60 mph with 225/85R14 fitted (calibrated for 205/85R14), your real speed is 62.9 mph. Your odometer will under-count miles by about 4.8%.
Will 225/85R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.67 inches of ground clearance at the axle.

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