Tire Size Box

275/75R17 vs 295/75R17

295/75R17 compared with 275/75R17

+3.6% diameter, +0.8" width

295/75R17 is 34.42" tall vs 33.24". More than the 3% rule of thumb, so check carefully before switching.

33.2"17" rim8.1"10.8" wide
275/75R17 (solid) compared with 295/75R17 (dashed outline), drawn to scale

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

62.1 mph

295/75R17 is +1.18 inches (+3.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

275/75R17295/75R17Difference%
Overall diameter33.24"34.42"+1.18"+3.6%
Section width10.83"11.61"+0.79"+7.3%
Sidewall height8.12"8.71"+0.59"+7.3%
Circumference104.43"108.14"+3.71"+3.6%
Revolutions per mile606.7585.9−20.8−3.4%

Speedometer difference

If your vehicle came with 275/75R17 and you fit 295/75R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.4 mph+1.4 mph
50 mph51.8 mph+1.8 mph
60 mph62.1 mph+2.1 mph
65 mph67.3 mph+2.3 mph
70 mph72.5 mph+2.5 mph
75 mph77.7 mph+2.7 mph
80 mph82.8 mph+2.8 mph

Each size on its own

Questions

Which is bigger, 275/75R17 or 295/75R17?
295/75R17 is taller by 1.18 inches (34.42" vs 33.24"). 295/75R17 is wider by 0.79 inches.
Can I replace 275/75R17 with 295/75R17?
It is not recommended without checking carefully. The diameter difference is +3.6%, 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 295/75R17 change my speedometer?
When your speedometer reads 60 mph with 295/75R17 fitted (calibrated for 275/75R17), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.6%.
Will 295/75R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.59 inches of ground clearance at the axle.

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