Tire Size Box

205/75R14 vs 225/75R14

225/75R14 compared with 205/75R14

+4.5% diameter, +0.8" width

225/75R14 is 27.29" tall vs 26.11". More than the 3% rule of thumb, so check carefully before switching.

26.1"14" rim6.1"8.1" wide
205/75R14 (solid) compared with 225/75R14 (dashed outline), drawn to scale

With 225/75R14 tires, when your speedometer says 60 mph you are really going

62.7 mph

225/75R14 is +1.18 inches (+4.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/75R14225/75R14Difference%
Overall diameter26.11"27.29"+1.18"+4.5%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height6.05"6.64"+0.59"+9.8%
Circumference82.02"85.73"+3.71"+4.5%
Revolutions per mile772.5739.1−33.4−4.3%

Speedometer difference

If your vehicle came with 205/75R14 and you fit 225/75R14, 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 mph41.8 mph+1.8 mph
50 mph52.3 mph+2.3 mph
60 mph62.7 mph+2.7 mph
65 mph67.9 mph+2.9 mph
70 mph73.2 mph+3.2 mph
75 mph78.4 mph+3.4 mph
80 mph83.6 mph+3.6 mph

Each size on its own

Questions

Which is bigger, 205/75R14 or 225/75R14?
225/75R14 is taller by 1.18 inches (27.29" vs 26.11"). 225/75R14 is wider by 0.79 inches.
Can I replace 205/75R14 with 225/75R14?
It is not recommended without checking carefully. The diameter difference is +4.5%, 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 225/75R14 change my speedometer?
When your speedometer reads 60 mph with 225/75R14 fitted (calibrated for 205/75R14), your real speed is 62.7 mph. Your odometer will under-count miles by about 4.5%.
Will 225/75R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

Other comparisons