Tire Size Box

205/70R14 vs 225/70R14

225/70R14 compared with 205/70R14

+4.4% diameter, +0.8" width

225/70R14 is 26.40" tall vs 25.30". More than the 3% rule of thumb, so check carefully before switching.

25.3"14" rim5.6"8.1" wide
205/70R14 (solid) compared with 225/70R14 (dashed outline), drawn to scale

With 225/70R14 tires, when your speedometer says 60 mph you are really going

62.6 mph

225/70R14 is +1.10 inches (+4.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/70R14225/70R14Difference%
Overall diameter25.30"26.40"+1.10"+4.4%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height5.65"6.20"+0.55"+9.8%
Circumference79.48"82.94"+3.46"+4.4%
Revolutions per mile797.2763.9−33.3−4.2%

Speedometer difference

If your vehicle came with 205/70R14 and you fit 225/70R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.9 mph+0.9 mph
30 mph31.3 mph+1.3 mph
40 mph41.7 mph+1.7 mph
50 mph52.2 mph+2.2 mph
60 mph62.6 mph+2.6 mph
65 mph67.8 mph+2.8 mph
70 mph73.1 mph+3.1 mph
75 mph78.3 mph+3.3 mph
80 mph83.5 mph+3.5 mph

Each size on its own

Questions

Which is bigger, 205/70R14 or 225/70R14?
225/70R14 is taller by 1.10 inches (26.40" vs 25.30"). 225/70R14 is wider by 0.79 inches.
Can I replace 205/70R14 with 225/70R14?
It is not recommended without checking carefully. The diameter difference is +4.4%, 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 225/70R14 change my speedometer?
When your speedometer reads 60 mph with 225/70R14 fitted (calibrated for 205/70R14), your real speed is 62.6 mph. Your odometer will under-count miles by about 4.4%.
Will 225/70R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.55 inches of ground clearance at the axle.

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