Tire Size Box

355/30R19 vs 355/35R19

355/35R19 compared with 355/30R19

+5.1% diameter, 0.0" width

355/35R19 is 28.78" tall vs 27.39". More than the 3% rule of thumb, so check carefully before switching.

27.4"19" rim4.2"14.0" wide
355/30R19 (solid) compared with 355/35R19 (dashed outline), drawn to scale

With 355/35R19 tires, when your speedometer says 60 mph you are really going

63.1 mph

355/35R19 is +1.40 inches (+5.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

355/30R19355/35R19Difference%
Overall diameter27.39"28.78"+1.40"+5.1%
Section width13.98"13.98"0.00"0.0%
Sidewall height4.19"4.89"+0.70"+16.7%
Circumference86.04"90.43"+4.39"+5.1%
Revolutions per mile736.4700.7−35.8−4.9%

Speedometer difference

If your vehicle came with 355/30R19 and you fit 355/35R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.0 mph+1.0 mph
30 mph31.5 mph+1.5 mph
40 mph42.0 mph+2.0 mph
50 mph52.6 mph+2.6 mph
60 mph63.1 mph+3.1 mph
65 mph68.3 mph+3.3 mph
70 mph73.6 mph+3.6 mph
75 mph78.8 mph+3.8 mph
80 mph84.1 mph+4.1 mph

Each size on its own

Questions

Which is bigger, 355/30R19 or 355/35R19?
355/35R19 is taller by 1.40 inches (28.78" vs 27.39"). 355/30R19 is the same width.
Can I replace 355/30R19 with 355/35R19?
It is not recommended without checking carefully. The diameter difference is +5.1%, 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 355/35R19 change my speedometer?
When your speedometer reads 60 mph with 355/35R19 fitted (calibrated for 355/30R19), your real speed is 63.1 mph. Your odometer will under-count miles by about 5.1%.
Will 355/35R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.70 inches of ground clearance at the axle.

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