Tire Size Box

345/25R22 vs 345/35R22

345/35R22 compared with 345/25R22

+9.4% diameter, 0.0" width

345/35R22 is 31.51" 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 345/35R22 (dashed outline), drawn to scale

With 345/35R22 tires, when your speedometer says 60 mph you are really going

65.7 mph

345/35R22 is +2.72 inches (+9.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

345/25R22345/35R22Difference%
Overall diameter28.79"31.51"+2.72"+9.4%
Section width13.58"13.58"0.00"0.0%
Sidewall height3.40"4.75"+1.36"+40.0%
Circumference90.45"98.98"+8.53"+9.4%
Revolutions per mile700.5640.1−60.4−8.6%

Speedometer difference

If your vehicle came with 345/25R22 and you fit 345/35R22, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.9 mph+1.9 mph
30 mph32.8 mph+2.8 mph
40 mph43.8 mph+3.8 mph
50 mph54.7 mph+4.7 mph
60 mph65.7 mph+5.7 mph
65 mph71.1 mph+6.1 mph
70 mph76.6 mph+6.6 mph
75 mph82.1 mph+7.1 mph
80 mph87.5 mph+7.5 mph

Each size on its own

Questions

Which is bigger, 345/25R22 or 345/35R22?
345/35R22 is taller by 2.72 inches (31.51" vs 28.79"). 345/25R22 is the same width.
Can I replace 345/25R22 with 345/35R22?
It is not recommended without checking carefully. The diameter difference is +9.4%, 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 345/35R22 change my speedometer?
When your speedometer reads 60 mph with 345/35R22 fitted (calibrated for 345/25R22), your real speed is 65.7 mph. Your odometer will under-count miles by about 9.4%.
Will 345/35R22 lift my vehicle?
Ride height changes by half the diameter difference: +1.36 inches of ground clearance at the axle.

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