Tire Size Box

205/80R14 vs 225/80R14

225/80R14 compared with 205/80R14

+4.7% diameter, +0.8" width

225/80R14 is 28.17" tall vs 26.91". More than the 3% rule of thumb, so check carefully before switching.

26.9"14" rim6.5"8.1" wide
205/80R14 (solid) compared with 225/80R14 (dashed outline), drawn to scale

With 225/80R14 tires, when your speedometer says 60 mph you are really going

62.8 mph

225/80R14 is +1.26 inches (+4.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/80R14225/80R14Difference%
Overall diameter26.91"28.17"+1.26"+4.7%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height6.46"7.09"+0.63"+9.8%
Circumference84.55"88.51"+3.96"+4.7%
Revolutions per mile749.4715.9−33.5−4.5%

Speedometer difference

If your vehicle came with 205/80R14 and you fit 225/80R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.9 mph+0.9 mph
30 mph31.4 mph+1.4 mph
40 mph41.9 mph+1.9 mph
50 mph52.3 mph+2.3 mph
60 mph62.8 mph+2.8 mph
65 mph68.0 mph+3.0 mph
70 mph73.3 mph+3.3 mph
75 mph78.5 mph+3.5 mph
80 mph83.7 mph+3.7 mph

Each size on its own

Questions

Which is bigger, 205/80R14 or 225/80R14?
225/80R14 is taller by 1.26 inches (28.17" vs 26.91"). 225/80R14 is wider by 0.79 inches.
Can I replace 205/80R14 with 225/80R14?
It is not recommended without checking carefully. The diameter difference is +4.7%, 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 225/80R14 change my speedometer?
When your speedometer reads 60 mph with 225/80R14 fitted (calibrated for 205/80R14), your real speed is 62.8 mph. Your odometer will under-count miles by about 4.7%.
Will 225/80R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.63 inches of ground clearance at the axle.

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