Tire Size Box

355/35R22 vs 355/45R22

355/45R22 compared with 355/35R22

+8.8% diameter, 0.0" width

355/45R22 is 34.58" tall vs 31.78". More than the 3% rule of thumb, so check carefully before switching.

31.8"22" rim4.9"14.0" wide
355/35R22 (solid) compared with 355/45R22 (dashed outline), drawn to scale

With 355/45R22 tires, when your speedometer says 60 mph you are really going

65.3 mph

355/45R22 is +2.80 inches (+8.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

355/35R22355/45R22Difference%
Overall diameter31.78"34.58"+2.80"+8.8%
Section width13.98"13.98"0.00"0.0%
Sidewall height4.89"6.29"+1.40"+28.6%
Circumference99.85"108.63"+8.78"+8.8%
Revolutions per mile634.5583.3−51.3−8.1%

Speedometer difference

If your vehicle came with 355/35R22 and you fit 355/45R22, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.8 mph+1.8 mph
30 mph32.6 mph+2.6 mph
40 mph43.5 mph+3.5 mph
50 mph54.4 mph+4.4 mph
60 mph65.3 mph+5.3 mph
65 mph70.7 mph+5.7 mph
70 mph76.2 mph+6.2 mph
75 mph81.6 mph+6.6 mph
80 mph87.0 mph+7.0 mph

Each size on its own

Questions

Which is bigger, 355/35R22 or 355/45R22?
355/45R22 is taller by 2.80 inches (34.58" vs 31.78"). 355/35R22 is the same width.
Can I replace 355/35R22 with 355/45R22?
It is not recommended without checking carefully. The diameter difference is +8.8%, 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 355/45R22 change my speedometer?
When your speedometer reads 60 mph with 355/45R22 fitted (calibrated for 355/35R22), your real speed is 65.3 mph. Your odometer will under-count miles by about 8.8%.
Will 355/45R22 lift my vehicle?
Ride height changes by half the diameter difference: +1.40 inches of ground clearance at the axle.

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