Tire Size Box

345/25R22 vs 335/30R22

335/30R22 compared with 345/25R22

+3.9% diameter, −0.4" width

335/30R22 is 29.91" tall vs 28.79". More than the 3% rule of thumb, so check carefully before switching.

28.8"22" rim3.4"13.6" wide
345/25R22 (solid) compared with 335/30R22 (dashed outline), drawn to scale

With 335/30R22 tires, when your speedometer says 60 mph you are really going

62.3 mph

335/30R22 is +1.12 inches (+3.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

345/25R22335/30R22Difference%
Overall diameter28.79"29.91"+1.12"+3.9%
Section width13.58"13.19"−0.39"−2.9%
Sidewall height3.40"3.96"+0.56"+16.5%
Circumference90.45"93.98"+3.53"+3.9%
Revolutions per mile700.5674.2−26.3−3.8%

Speedometer difference

If your vehicle came with 345/25R22 and you fit 335/30R22, 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 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, 345/25R22 or 335/30R22?
335/30R22 is taller by 1.12 inches (29.91" vs 28.79"). 345/25R22 is wider by 0.39 inches.
Can I replace 345/25R22 with 335/30R22?
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 335/30R22 change my speedometer?
When your speedometer reads 60 mph with 335/30R22 fitted (calibrated for 345/25R22), your real speed is 62.3 mph. Your odometer will under-count miles by about 3.9%.
Will 335/30R22 lift my vehicle?
Ride height changes by half the diameter difference: +0.56 inches of ground clearance at the axle.

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