Tire Size Box

205/75R13 vs 225/75R13

225/75R13 compared with 205/75R13

+4.7% diameter, +0.8" width

225/75R13 is 26.29" tall vs 25.11". More than the 3% rule of thumb, so check carefully before switching.

25.1"13" rim6.1"8.1" wide
205/75R13 (solid) compared with 225/75R13 (dashed outline), drawn to scale

With 225/75R13 tires, when your speedometer says 60 mph you are really going

62.8 mph

225/75R13 is +1.18 inches (+4.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/75R13225/75R13Difference%
Overall diameter25.11"26.29"+1.18"+4.7%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height6.05"6.64"+0.59"+9.8%
Circumference78.87"82.58"+3.71"+4.7%
Revolutions per mile803.3767.2−36.1−4.5%

Speedometer difference

If your vehicle came with 205/75R13 and you fit 225/75R13, 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 mph52.4 mph+2.4 mph
60 mph62.8 mph+2.8 mph
65 mph68.1 mph+3.1 mph
70 mph73.3 mph+3.3 mph
75 mph78.5 mph+3.5 mph
80 mph83.8 mph+3.8 mph

Each size on its own

Questions

Which is bigger, 205/75R13 or 225/75R13?
225/75R13 is taller by 1.18 inches (26.29" vs 25.11"). 225/75R13 is wider by 0.79 inches.
Can I replace 205/75R13 with 225/75R13?
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 225/75R13 change my speedometer?
When your speedometer reads 60 mph with 225/75R13 fitted (calibrated for 205/75R13), your real speed is 62.8 mph. Your odometer will under-count miles by about 4.7%.
Will 225/75R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

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