Tire Size Box

205/70R13 vs 205/75R13

205/75R13 compared with 205/70R13

+3.3% diameter, 0.0" width

205/75R13 is 25.11" 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 205/75R13 (dashed outline), drawn to scale

With 205/75R13 tires, when your speedometer says 60 mph you are really going

62.0 mph

205/75R13 is +0.81 inches (+3.3%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/70R13205/75R13Difference%
Overall diameter24.30"25.11"+0.81"+3.3%
Section width8.07"8.07"0.00"0.0%
Sidewall height5.65"6.05"+0.40"+7.1%
Circumference76.34"78.87"+2.54"+3.3%
Revolutions per mile830.0803.3−26.7−3.2%

Speedometer difference

If your vehicle came with 205/70R13 and you fit 205/75R13, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.0 mph+1.0 mph
40 mph41.3 mph+1.3 mph
50 mph51.7 mph+1.7 mph
60 mph62.0 mph+2.0 mph
65 mph67.2 mph+2.2 mph
70 mph72.3 mph+2.3 mph
75 mph77.5 mph+2.5 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 205/70R13 or 205/75R13?
205/75R13 is taller by 0.81 inches (25.11" vs 24.30"). 205/70R13 is the same width.
Can I replace 205/70R13 with 205/75R13?
It is not recommended without checking carefully. The diameter difference is +3.3%, 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 205/75R13 change my speedometer?
When your speedometer reads 60 mph with 205/75R13 fitted (calibrated for 205/70R13), your real speed is 62.0 mph. Your odometer will under-count miles by about 3.3%.
Will 205/75R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.40 inches of ground clearance at the axle.

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