Tire Size Box

205/70R13 vs 225/70R13

225/70R13 compared with 205/70R13

+4.5% diameter, +0.8" width

225/70R13 is 25.40" tall vs 24.30". More than the 3% rule of thumb, so check carefully before switching.

24.3"13" rim5.6"8.1" wide
205/70R13 (solid) compared with 225/70R13 (dashed outline), drawn to scale

With 225/70R13 tires, when your speedometer says 60 mph you are really going

62.7 mph

225/70R13 is +1.10 inches (+4.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/70R13225/70R13Difference%
Overall diameter24.30"25.40"+1.10"+4.5%
Section width8.07"8.86"+0.79"+9.8%
Sidewall height5.65"6.20"+0.55"+9.8%
Circumference76.34"79.80"+3.46"+4.5%
Revolutions per mile830.0794.0−36.0−4.3%

Speedometer difference

If your vehicle came with 205/70R13 and you fit 225/70R13, 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, 205/70R13 or 225/70R13?
225/70R13 is taller by 1.10 inches (25.40" vs 24.30"). 225/70R13 is wider by 0.79 inches.
Can I replace 205/70R13 with 225/70R13?
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 225/70R13 change my speedometer?
When your speedometer reads 60 mph with 225/70R13 fitted (calibrated for 205/70R13), your real speed is 62.7 mph. Your odometer will under-count miles by about 4.5%.
Will 225/70R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.55 inches of ground clearance at the axle.

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