Tire Size Box

355/25R19 vs 335/30R19

335/30R19 compared with 355/25R19

+3.6% diameter, −0.8" width

335/30R19 is 26.91" tall vs 25.99". More than the 3% rule of thumb, so check carefully before switching.

26.0"19" rim3.5"14.0" wide
355/25R19 (solid) compared with 335/30R19 (dashed outline), drawn to scale

With 335/30R19 tires, when your speedometer says 60 mph you are really going

62.1 mph

335/30R19 is +0.93 inches (+3.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

355/25R19335/30R19Difference%
Overall diameter25.99"26.91"+0.93"+3.6%
Section width13.98"13.19"−0.79"−5.6%
Sidewall height3.49"3.96"+0.46"+13.2%
Circumference81.64"84.55"+2.91"+3.6%
Revolutions per mile776.0749.4−26.7−3.4%

Speedometer difference

If your vehicle came with 355/25R19 and you fit 335/30R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.4 mph+1.4 mph
50 mph51.8 mph+1.8 mph
60 mph62.1 mph+2.1 mph
65 mph67.3 mph+2.3 mph
70 mph72.5 mph+2.5 mph
75 mph77.7 mph+2.7 mph
80 mph82.8 mph+2.8 mph

Each size on its own

Questions

Which is bigger, 355/25R19 or 335/30R19?
335/30R19 is taller by 0.93 inches (26.91" vs 25.99"). 355/25R19 is wider by 0.79 inches.
Can I replace 355/25R19 with 335/30R19?
It is not recommended without checking carefully. The diameter difference is +3.6%, 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 335/30R19 change my speedometer?
When your speedometer reads 60 mph with 335/30R19 fitted (calibrated for 355/25R19), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.6%.
Will 335/30R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.46 inches of ground clearance at the axle.

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