Tire Size Box

205/65R13 vs 205/75R13

205/75R13 compared with 205/65R13

+6.9% diameter, 0.0" width

205/75R13 is 25.11" tall vs 23.49". More than the 3% rule of thumb, so check carefully before switching.

23.5"13" rim5.2"8.1" wide
205/65R13 (solid) compared with 205/75R13 (dashed outline), drawn to scale

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

64.1 mph

205/75R13 is +1.61 inches (+6.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/65R13205/75R13Difference%
Overall diameter23.49"25.11"+1.61"+6.9%
Section width8.07"8.07"0.00"0.0%
Sidewall height5.25"6.05"+0.81"+15.4%
Circumference73.80"78.87"+5.07"+6.9%
Revolutions per mile858.5803.3−55.2−6.4%

Speedometer difference

If your vehicle came with 205/65R13 and you fit 205/75R13, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.1 mph+2.1 mph
40 mph42.7 mph+2.7 mph
50 mph53.4 mph+3.4 mph
60 mph64.1 mph+4.1 mph
65 mph69.5 mph+4.5 mph
70 mph74.8 mph+4.8 mph
75 mph80.2 mph+5.2 mph
80 mph85.5 mph+5.5 mph

Each size on its own

Questions

Which is bigger, 205/65R13 or 205/75R13?
205/75R13 is taller by 1.61 inches (25.11" vs 23.49"). 205/65R13 is the same width.
Can I replace 205/65R13 with 205/75R13?
It is not recommended without checking carefully. The diameter difference is +6.9%, 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 205/65R13), your real speed is 64.1 mph. Your odometer will under-count miles by about 6.9%.
Will 205/75R13 lift my vehicle?
Ride height changes by half the diameter difference: +0.81 inches of ground clearance at the axle.

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