Tire Size Box

235/30R22 vs 235/35R22

235/35R22 compared with 235/30R22

+3.4% diameter, 0.0" width

235/35R22 is 28.48" tall vs 27.55". More than the 3% rule of thumb, so check carefully before switching.

27.6"22" rim2.8"9.3" wide
235/30R22 (solid) compared with 235/35R22 (dashed outline), drawn to scale

With 235/35R22 tires, when your speedometer says 60 mph you are really going

62.0 mph

235/35R22 is +0.93 inches (+3.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

235/30R22235/35R22Difference%
Overall diameter27.55"28.48"+0.93"+3.4%
Section width9.25"9.25"0.00"0.0%
Sidewall height2.78"3.24"+0.46"+16.7%
Circumference86.55"89.46"+2.91"+3.4%
Revolutions per mile732.0708.2−23.8−3.2%

Speedometer difference

If your vehicle came with 235/30R22 and you fit 235/35R22, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.0 mph+1.0 mph
40 mph41.3 mph+1.3 mph
50 mph51.7 mph+1.7 mph
60 mph62.0 mph+2.0 mph
65 mph67.2 mph+2.2 mph
70 mph72.4 mph+2.4 mph
75 mph77.5 mph+2.5 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 235/30R22 or 235/35R22?
235/35R22 is taller by 0.93 inches (28.48" vs 27.55"). 235/30R22 is the same width.
Can I replace 235/30R22 with 235/35R22?
It is not recommended without checking carefully. The diameter difference is +3.4%, 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 235/35R22 change my speedometer?
When your speedometer reads 60 mph with 235/35R22 fitted (calibrated for 235/30R22), your real speed is 62.0 mph. Your odometer will under-count miles by about 3.4%.
Will 235/35R22 lift my vehicle?
Ride height changes by half the diameter difference: +0.46 inches of ground clearance at the axle.

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