Tire Size Box

295/25R22 vs 285/30R22

285/30R22 compared with 295/25R22

+3.3% diameter, −0.4" width

285/30R22 is 28.73" tall vs 27.81". More than the 3% rule of thumb, so check carefully before switching.

27.8"22" rim2.9"11.6" wide
295/25R22 (solid) compared with 285/30R22 (dashed outline), drawn to scale

With 285/30R22 tires, when your speedometer says 60 mph you are really going

62.0 mph

285/30R22 is +0.93 inches (+3.3%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/25R22285/30R22Difference%
Overall diameter27.81"28.73"+0.93"+3.3%
Section width11.61"11.22"−0.39"−3.4%
Sidewall height2.90"3.37"+0.46"+15.9%
Circumference87.36"90.27"+2.91"+3.3%
Revolutions per mile725.3701.9−23.4−3.2%

Speedometer difference

If your vehicle came with 295/25R22 and you fit 285/30R22, 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 mph41.3 mph+1.3 mph
50 mph51.7 mph+1.7 mph
60 mph62.0 mph+2.0 mph
65 mph67.2 mph+2.2 mph
70 mph72.3 mph+2.3 mph
75 mph77.5 mph+2.5 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 295/25R22 or 285/30R22?
285/30R22 is taller by 0.93 inches (28.73" vs 27.81"). 295/25R22 is wider by 0.39 inches.
Can I replace 295/25R22 with 285/30R22?
It is not recommended without checking carefully. The diameter difference is +3.3%, 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 285/30R22 change my speedometer?
When your speedometer reads 60 mph with 285/30R22 fitted (calibrated for 295/25R22), your real speed is 62.0 mph. Your odometer will under-count miles by about 3.3%.
Will 285/30R22 lift my vehicle?
Ride height changes by half the diameter difference: +0.46 inches of ground clearance at the axle.

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