Tire Size Box

225/60R13 vs 245/60R13

245/60R13 compared with 225/60R13

+4.0% diameter, +0.8" width

245/60R13 is 24.57" tall vs 23.63". More than the 3% rule of thumb, so check carefully before switching.

23.6"13" rim5.3"8.9" wide
225/60R13 (solid) compared with 245/60R13 (dashed outline), drawn to scale

With 245/60R13 tires, when your speedometer says 60 mph you are really going

62.4 mph

245/60R13 is +0.94 inches (+4.0%) in overall diameter. That is more than the 3% most shops and makers recommend.

225/60R13245/60R13Difference%
Overall diameter23.63"24.57"+0.94"+4.0%
Section width8.86"9.65"+0.79"+8.9%
Sidewall height5.31"5.79"+0.47"+8.9%
Circumference74.24"77.20"+2.97"+4.0%
Revolutions per mile853.5820.7−32.8−3.8%

Speedometer difference

If your vehicle came with 225/60R13 and you fit 245/60R13, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.8 mph+0.8 mph
30 mph31.2 mph+1.2 mph
40 mph41.6 mph+1.6 mph
50 mph52.0 mph+2.0 mph
60 mph62.4 mph+2.4 mph
65 mph67.6 mph+2.6 mph
70 mph72.8 mph+2.8 mph
75 mph78.0 mph+3.0 mph
80 mph83.2 mph+3.2 mph

Each size on its own

Questions

Which is bigger, 225/60R13 or 245/60R13?
245/60R13 is taller by 0.94 inches (24.57" vs 23.63"). 245/60R13 is wider by 0.79 inches.
Can I replace 225/60R13 with 245/60R13?
It is not recommended without checking carefully. The diameter difference is +4.0%, 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 245/60R13 change my speedometer?
When your speedometer reads 60 mph with 245/60R13 fitted (calibrated for 225/60R13), your real speed is 62.4 mph. Your odometer will under-count miles by about 4.0%.
Will 245/60R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.47 inches of ground clearance at the axle.

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