Tire Size Box

335/30R19 vs 325/35R19

325/35R19 compared with 335/30R19

+3.9% diameter, −0.4" width

325/35R19 is 27.96" tall vs 26.91". More than the 3% rule of thumb, so check carefully before switching.

26.9"19" rim4.0"13.2" wide
335/30R19 (solid) compared with 325/35R19 (dashed outline), drawn to scale

With 325/35R19 tires, when your speedometer says 60 mph you are really going

62.3 mph

325/35R19 is +1.04 inches (+3.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

335/30R19325/35R19Difference%
Overall diameter26.91"27.96"+1.04"+3.9%
Section width13.19"12.80"−0.39"−3.0%
Sidewall height3.96"4.48"+0.52"+13.2%
Circumference84.55"87.83"+3.28"+3.9%
Revolutions per mile749.4721.4−28.0−3.7%

Speedometer difference

If your vehicle came with 335/30R19 and you fit 325/35R19, 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, 335/30R19 or 325/35R19?
325/35R19 is taller by 1.04 inches (27.96" vs 26.91"). 335/30R19 is wider by 0.39 inches.
Can I replace 335/30R19 with 325/35R19?
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 325/35R19 change my speedometer?
When your speedometer reads 60 mph with 325/35R19 fitted (calibrated for 335/30R19), your real speed is 62.3 mph. Your odometer will under-count miles by about 3.9%.
Will 325/35R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.52 inches of ground clearance at the axle.

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