Tire Size Box

215/65R14 vs 215/75R14

215/75R14 compared with 215/65R14

+6.8% diameter, 0.0" width

215/75R14 is 26.70" tall vs 25.00". More than the 3% rule of thumb, so check carefully before switching.

25.0"14" rim5.5"8.5" wide
215/65R14 (solid) compared with 215/75R14 (dashed outline), drawn to scale

With 215/75R14 tires, when your speedometer says 60 mph you are really going

64.1 mph

215/75R14 is +1.69 inches (+6.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

215/65R14215/75R14Difference%
Overall diameter25.00"26.70"+1.69"+6.8%
Section width8.46"8.46"0.00"0.0%
Sidewall height5.50"6.35"+0.85"+15.4%
Circumference78.55"83.87"+5.32"+6.8%
Revolutions per mile806.6755.4−51.1−6.3%

Speedometer difference

If your vehicle came with 215/65R14 and you fit 215/75R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.0 mph+2.0 mph
40 mph42.7 mph+2.7 mph
50 mph53.4 mph+3.4 mph
60 mph64.1 mph+4.1 mph
65 mph69.4 mph+4.4 mph
70 mph74.7 mph+4.7 mph
75 mph80.1 mph+5.1 mph
80 mph85.4 mph+5.4 mph

Each size on its own

Questions

Which is bigger, 215/65R14 or 215/75R14?
215/75R14 is taller by 1.69 inches (26.70" vs 25.00"). 215/65R14 is the same width.
Can I replace 215/65R14 with 215/75R14?
It is not recommended without checking carefully. The diameter difference is +6.8%, 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 215/75R14 change my speedometer?
When your speedometer reads 60 mph with 215/75R14 fitted (calibrated for 215/65R14), your real speed is 64.1 mph. Your odometer will under-count miles by about 6.8%.
Will 215/75R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.85 inches of ground clearance at the axle.

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