Tire Size Box

215/55R19 vs 235/55R19

235/55R19 compared with 215/55R19

+3.1% diameter, +0.8" width

235/55R19 is 29.18" tall vs 28.31". More than the 3% rule of thumb, so check carefully before switching.

28.3"19" rim4.7"8.5" wide
215/55R19 (solid) compared with 235/55R19 (dashed outline), drawn to scale

With 235/55R19 tires, when your speedometer says 60 mph you are really going

61.8 mph

235/55R19 is +0.87 inches (+3.1%) in overall diameter. That is more than the 3% most shops and makers recommend.

215/55R19235/55R19Difference%
Overall diameter28.31"29.18"+0.87"+3.1%
Section width8.46"9.25"+0.79"+9.3%
Sidewall height4.66"5.09"+0.43"+9.3%
Circumference88.94"91.66"+2.72"+3.1%
Revolutions per mile712.4691.2−21.1−3.0%

Speedometer difference

If your vehicle came with 215/55R19 and you fit 235/55R19, 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 mph61.8 mph+1.8 mph
65 mph67.0 mph+2.0 mph
70 mph72.1 mph+2.1 mph
75 mph77.3 mph+2.3 mph
80 mph82.4 mph+2.4 mph

Each size on its own

Questions

Which is bigger, 215/55R19 or 235/55R19?
235/55R19 is taller by 0.87 inches (29.18" vs 28.31"). 235/55R19 is wider by 0.79 inches.
Can I replace 215/55R19 with 235/55R19?
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 235/55R19 change my speedometer?
When your speedometer reads 60 mph with 235/55R19 fitted (calibrated for 215/55R19), your real speed is 61.8 mph. Your odometer will under-count miles by about 3.1%.
Will 235/55R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.43 inches of ground clearance at the axle.

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