Tire Size Box

345/45R19 vs 335/50R19

335/50R19 compared with 345/45R19

+3.1% diameter, −0.4" width

335/50R19 is 32.19" tall vs 31.22". More than the 3% rule of thumb, so check carefully before switching.

31.2"19" rim6.1"13.6" wide
345/45R19 (solid) compared with 335/50R19 (dashed outline), drawn to scale

With 335/50R19 tires, when your speedometer says 60 mph you are really going

61.9 mph

335/50R19 is +0.96 inches (+3.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

345/45R19335/50R19Difference%
Overall diameter31.22"32.19"+0.96"+3.1%
Section width13.58"13.19"−0.39"−2.9%
Sidewall height6.11"6.59"+0.48"+7.9%
Circumference98.09"101.12"+3.03"+3.1%
Revolutions per mile645.9626.6−19.4−3.0%

Speedometer difference

If your vehicle came with 345/45R19 and you fit 335/50R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.6 mph+0.6 mph
30 mph30.9 mph+0.9 mph
40 mph41.2 mph+1.2 mph
50 mph51.5 mph+1.5 mph
60 mph61.9 mph+1.9 mph
65 mph67.0 mph+2.0 mph
70 mph72.2 mph+2.2 mph
75 mph77.3 mph+2.3 mph
80 mph82.5 mph+2.5 mph

Each size on its own

Questions

Which is bigger, 345/45R19 or 335/50R19?
335/50R19 is taller by 0.96 inches (32.19" vs 31.22"). 345/45R19 is wider by 0.39 inches.
Can I replace 345/45R19 with 335/50R19?
It is not recommended without checking carefully. The diameter difference is +3.1%, 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 335/50R19 change my speedometer?
When your speedometer reads 60 mph with 335/50R19 fitted (calibrated for 345/45R19), your real speed is 61.9 mph. Your odometer will under-count miles by about 3.1%.
Will 335/50R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.48 inches of ground clearance at the axle.

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