Tire Size Box

295/65R17 vs 295/75R17

295/75R17 compared with 295/65R17

+7.2% diameter, 0.0" width

295/75R17 is 34.42" tall vs 32.10". More than the 3% rule of thumb, so check carefully before switching.

32.1"17" rim7.5"11.6" wide
295/65R17 (solid) compared with 295/75R17 (dashed outline), drawn to scale

With 295/75R17 tires, when your speedometer says 60 mph you are really going

64.3 mph

295/75R17 is +2.32 inches (+7.2%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/65R17295/75R17Difference%
Overall diameter32.10"34.42"+2.32"+7.2%
Section width11.61"11.61"0.00"0.0%
Sidewall height7.55"8.71"+1.16"+15.4%
Circumference100.84"108.14"+7.30"+7.2%
Revolutions per mile628.3585.9−42.4−6.7%

Speedometer difference

If your vehicle came with 295/65R17 and you fit 295/75R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.2 mph+2.2 mph
40 mph42.9 mph+2.9 mph
50 mph53.6 mph+3.6 mph
60 mph64.3 mph+4.3 mph
65 mph69.7 mph+4.7 mph
70 mph75.1 mph+5.1 mph
75 mph80.4 mph+5.4 mph
80 mph85.8 mph+5.8 mph

Each size on its own

Questions

Which is bigger, 295/65R17 or 295/75R17?
295/75R17 is taller by 2.32 inches (34.42" vs 32.10"). 295/65R17 is the same width.
Can I replace 295/65R17 with 295/75R17?
It is not recommended without checking carefully. The diameter difference is +7.2%, 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 295/75R17 change my speedometer?
When your speedometer reads 60 mph with 295/75R17 fitted (calibrated for 295/65R17), your real speed is 64.3 mph. Your odometer will under-count miles by about 7.2%.
Will 295/75R17 lift my vehicle?
Ride height changes by half the diameter difference: +1.16 inches of ground clearance at the axle.

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