Tire Size Box

275/65R20 vs 295/65R20

295/65R20 compared with 275/65R20

+3.0% diameter, +0.8" width

295/65R20 is 35.10" tall vs 34.07". More than the 3% rule of thumb, so check carefully before switching.

34.1"20" rim7.0"10.8" wide
275/65R20 (solid) compared with 295/65R20 (dashed outline), drawn to scale

With 295/65R20 tires, when your speedometer says 60 mph you are really going

61.8 mph

295/65R20 is +1.02 inches (+3.0%) in overall diameter. That is more than the 3% most shops and makers recommend.

275/65R20295/65R20Difference%
Overall diameter34.07"35.10"+1.02"+3.0%
Section width10.83"11.61"+0.79"+7.3%
Sidewall height7.04"7.55"+0.51"+7.3%
Circumference107.05"110.26"+3.22"+3.0%
Revolutions per mile591.9574.6−17.3−2.9%

Speedometer difference

If your vehicle came with 275/65R20 and you fit 295/65R20, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.6 mph+0.6 mph
30 mph30.9 mph+0.9 mph
40 mph41.2 mph+1.2 mph
50 mph51.5 mph+1.5 mph
60 mph61.8 mph+1.8 mph
65 mph67.0 mph+2.0 mph
70 mph72.1 mph+2.1 mph
75 mph77.3 mph+2.3 mph
80 mph82.4 mph+2.4 mph

Each size on its own

Questions

Which is bigger, 275/65R20 or 295/65R20?
295/65R20 is taller by 1.02 inches (35.10" vs 34.07"). 295/65R20 is wider by 0.79 inches.
Can I replace 275/65R20 with 295/65R20?
It is not recommended without checking carefully. The diameter difference is +3.0%, 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 295/65R20 change my speedometer?
When your speedometer reads 60 mph with 295/65R20 fitted (calibrated for 275/65R20), your real speed is 61.8 mph. Your odometer will under-count miles by about 3.0%.
Will 295/65R20 lift my vehicle?
Ride height changes by half the diameter difference: +0.51 inches of ground clearance at the axle.

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