Tire Size Box

335/40R22 vs 335/45R22

335/45R22 compared with 335/40R22

+4.1% diameter, 0.0" width

335/45R22 is 33.87" tall vs 32.55". More than the 3% rule of thumb, so check carefully before switching.

32.6"22" rim5.3"13.2" wide
335/40R22 (solid) compared with 335/45R22 (dashed outline), drawn to scale

With 335/45R22 tires, when your speedometer says 60 mph you are really going

62.4 mph

335/45R22 is +1.32 inches (+4.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

335/40R22335/45R22Difference%
Overall diameter32.55"33.87"+1.32"+4.1%
Section width13.19"13.19"0.00"0.0%
Sidewall height5.28"5.94"+0.66"+12.5%
Circumference102.26"106.41"+4.14"+4.1%
Revolutions per mile619.6595.5−24.1−3.9%

Speedometer difference

If your vehicle came with 335/40R22 and you fit 335/45R22, 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 mph41.6 mph+1.6 mph
50 mph52.0 mph+2.0 mph
60 mph62.4 mph+2.4 mph
65 mph67.6 mph+2.6 mph
70 mph72.8 mph+2.8 mph
75 mph78.0 mph+3.0 mph
80 mph83.2 mph+3.2 mph

Each size on its own

Questions

Which is bigger, 335/40R22 or 335/45R22?
335/45R22 is taller by 1.32 inches (33.87" vs 32.55"). 335/40R22 is the same width.
Can I replace 335/40R22 with 335/45R22?
It is not recommended without checking carefully. The diameter difference is +4.1%, 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 335/45R22 change my speedometer?
When your speedometer reads 60 mph with 335/45R22 fitted (calibrated for 335/40R22), your real speed is 62.4 mph. Your odometer will under-count miles by about 4.1%.
Will 335/45R22 lift my vehicle?
Ride height changes by half the diameter difference: +0.66 inches of ground clearance at the axle.

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