Tire Size Box

215/65R17 vs 215/75R17

215/75R17 compared with 215/65R17

+6.0% diameter, 0.0" width

215/75R17 is 29.70" tall vs 28.00". More than the 3% rule of thumb, so check carefully before switching.

28.0"17" rim5.5"8.5" wide
215/65R17 (solid) compared with 215/75R17 (dashed outline), drawn to scale

With 215/75R17 tires, when your speedometer says 60 mph you are really going

63.6 mph

215/75R17 is +1.69 inches (+6.0%) in overall diameter. That is more than the 3% most shops and makers recommend.

215/65R17215/75R17Difference%
Overall diameter28.00"29.70"+1.69"+6.0%
Section width8.46"8.46"0.00"0.0%
Sidewall height5.50"6.35"+0.85"+15.4%
Circumference87.98"93.30"+5.32"+6.0%
Revolutions per mile720.2679.1−41.1−5.7%

Speedometer difference

If your vehicle came with 215/65R17 and you fit 215/75R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.2 mph+1.2 mph
30 mph31.8 mph+1.8 mph
40 mph42.4 mph+2.4 mph
50 mph53.0 mph+3.0 mph
60 mph63.6 mph+3.6 mph
65 mph68.9 mph+3.9 mph
70 mph74.2 mph+4.2 mph
75 mph79.5 mph+4.5 mph
80 mph84.8 mph+4.8 mph

Each size on its own

Questions

Which is bigger, 215/65R17 or 215/75R17?
215/75R17 is taller by 1.69 inches (29.70" vs 28.00"). 215/65R17 is the same width.
Can I replace 215/65R17 with 215/75R17?
It is not recommended without checking carefully. The diameter difference is +6.0%, 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 215/75R17 change my speedometer?
When your speedometer reads 60 mph with 215/75R17 fitted (calibrated for 215/65R17), your real speed is 63.6 mph. Your odometer will under-count miles by about 6.0%.
Will 215/75R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.85 inches of ground clearance at the axle.

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