Tire Size Box

335/45R19 vs 335/55R19

335/55R19 compared with 335/45R19

+8.5% diameter, 0.0" width

335/55R19 is 33.51" tall vs 30.87". More than the 3% rule of thumb, so check carefully before switching.

30.9"19" rim5.9"13.2" wide
335/45R19 (solid) compared with 335/55R19 (dashed outline), drawn to scale

With 335/55R19 tires, when your speedometer says 60 mph you are really going

65.1 mph

335/55R19 is +2.64 inches (+8.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

335/45R19335/55R19Difference%
Overall diameter30.87"33.51"+2.64"+8.5%
Section width13.19"13.19"0.00"0.0%
Sidewall height5.94"7.25"+1.32"+22.2%
Circumference96.98"105.27"+8.29"+8.5%
Revolutions per mile653.3601.9−51.4−7.9%

Speedometer difference

If your vehicle came with 335/45R19 and you fit 335/55R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.7 mph+1.7 mph
30 mph32.6 mph+2.6 mph
40 mph43.4 mph+3.4 mph
50 mph54.3 mph+4.3 mph
60 mph65.1 mph+5.1 mph
65 mph70.6 mph+5.6 mph
70 mph76.0 mph+6.0 mph
75 mph81.4 mph+6.4 mph
80 mph86.8 mph+6.8 mph

Each size on its own

Questions

Which is bigger, 335/45R19 or 335/55R19?
335/55R19 is taller by 2.64 inches (33.51" vs 30.87"). 335/45R19 is the same width.
Can I replace 335/45R19 with 335/55R19?
It is not recommended without checking carefully. The diameter difference is +8.5%, 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 335/55R19 change my speedometer?
When your speedometer reads 60 mph with 335/55R19 fitted (calibrated for 335/45R19), your real speed is 65.1 mph. Your odometer will under-count miles by about 8.5%.
Will 335/55R19 lift my vehicle?
Ride height changes by half the diameter difference: +1.32 inches of ground clearance at the axle.

Other comparisons