Tire Size Box

295/35R22 vs 295/40R22

295/40R22 compared with 295/35R22

+3.9% diameter, 0.0" width

295/40R22 is 31.29" tall vs 30.13". More than the 3% rule of thumb, so check carefully before switching.

30.1"22" rim4.1"11.6" wide
295/35R22 (solid) compared with 295/40R22 (dashed outline), drawn to scale

With 295/40R22 tires, when your speedometer says 60 mph you are really going

62.3 mph

295/40R22 is +1.16 inches (+3.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

295/35R22295/40R22Difference%
Overall diameter30.13"31.29"+1.16"+3.9%
Section width11.61"11.61"0.00"0.0%
Sidewall height4.06"4.65"+0.58"+14.3%
Circumference94.66"98.30"+3.65"+3.9%
Revolutions per mile669.4644.5−24.8−3.7%

Speedometer difference

If your vehicle came with 295/35R22 and you fit 295/40R22, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.8 mph+0.8 mph
30 mph31.2 mph+1.2 mph
40 mph41.5 mph+1.5 mph
50 mph51.9 mph+1.9 mph
60 mph62.3 mph+2.3 mph
65 mph67.5 mph+2.5 mph
70 mph72.7 mph+2.7 mph
75 mph77.9 mph+2.9 mph
80 mph83.1 mph+3.1 mph

Each size on its own

Questions

Which is bigger, 295/35R22 or 295/40R22?
295/40R22 is taller by 1.16 inches (31.29" vs 30.13"). 295/35R22 is the same width.
Can I replace 295/35R22 with 295/40R22?
It is not recommended without checking carefully. The diameter difference is +3.9%, 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 295/40R22 change my speedometer?
When your speedometer reads 60 mph with 295/40R22 fitted (calibrated for 295/35R22), your real speed is 62.3 mph. Your odometer will under-count miles by about 3.9%.
Will 295/40R22 lift my vehicle?
Ride height changes by half the diameter difference: +0.58 inches of ground clearance at the axle.

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