Tire Size Box

205/65R14 vs 205/75R14

205/75R14 compared with 205/65R14

+6.6% diameter, 0.0" width

205/75R14 is 26.11" tall vs 24.49". More than the 3% rule of thumb, so check carefully before switching.

24.5"14" rim5.2"8.1" wide
205/65R14 (solid) compared with 205/75R14 (dashed outline), drawn to scale

With 205/75R14 tires, when your speedometer says 60 mph you are really going

64.0 mph

205/75R14 is +1.61 inches (+6.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/65R14205/75R14Difference%
Overall diameter24.49"26.11"+1.61"+6.6%
Section width8.07"8.07"0.00"0.0%
Sidewall height5.25"6.05"+0.81"+15.4%
Circumference76.94"82.02"+5.07"+6.6%
Revolutions per mile823.5772.5−50.9−6.2%

Speedometer difference

If your vehicle came with 205/65R14 and you fit 205/75R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.3 mph+1.3 mph
30 mph32.0 mph+2.0 mph
40 mph42.6 mph+2.6 mph
50 mph53.3 mph+3.3 mph
60 mph64.0 mph+4.0 mph
65 mph69.3 mph+4.3 mph
70 mph74.6 mph+4.6 mph
75 mph79.9 mph+4.9 mph
80 mph85.3 mph+5.3 mph

Each size on its own

Questions

Which is bigger, 205/65R14 or 205/75R14?
205/75R14 is taller by 1.61 inches (26.11" vs 24.49"). 205/65R14 is the same width.
Can I replace 205/65R14 with 205/75R14?
It is not recommended without checking carefully. The diameter difference is +6.6%, 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 205/75R14 change my speedometer?
When your speedometer reads 60 mph with 205/75R14 fitted (calibrated for 205/65R14), your real speed is 64.0 mph. Your odometer will under-count miles by about 6.6%.
Will 205/75R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.81 inches of ground clearance at the axle.

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