Tire Size Box

275/70R17 vs 295/70R17

295/70R17 compared with 275/70R17

+3.4% diameter, +0.8" width

295/70R17 is 33.26" tall vs 32.16". More than the 3% rule of thumb, so check carefully before switching.

32.2"17" rim7.6"10.8" wide
275/70R17 (solid) compared with 295/70R17 (dashed outline), drawn to scale

With 295/70R17 tires, when your speedometer says 60 mph you are really going

62.1 mph

295/70R17 is +1.10 inches (+3.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

275/70R17295/70R17Difference%
Overall diameter32.16"33.26"+1.10"+3.4%
Section width10.83"11.61"+0.79"+7.3%
Sidewall height7.58"8.13"+0.55"+7.3%
Circumference101.03"104.49"+3.46"+3.4%
Revolutions per mile627.2606.4−20.8−3.3%

Speedometer difference

If your vehicle came with 275/70R17 and you fit 295/70R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.0 mph+1.0 mph
40 mph41.4 mph+1.4 mph
50 mph51.7 mph+1.7 mph
60 mph62.1 mph+2.1 mph
65 mph67.2 mph+2.2 mph
70 mph72.4 mph+2.4 mph
75 mph77.6 mph+2.6 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 275/70R17 or 295/70R17?
295/70R17 is taller by 1.10 inches (33.26" vs 32.16"). 295/70R17 is wider by 0.79 inches.
Can I replace 275/70R17 with 295/70R17?
It is not recommended without checking carefully. The diameter difference is +3.4%, 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 295/70R17 change my speedometer?
When your speedometer reads 60 mph with 295/70R17 fitted (calibrated for 275/70R17), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.4%.
Will 295/70R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.55 inches of ground clearance at the axle.

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