Tire Size Box

205/55R19 vs 205/65R19

205/65R19 compared with 205/55R19

+5.8% diameter, 0.0" width

205/65R19 is 29.49" tall vs 27.88". More than the 3% rule of thumb, so check carefully before switching.

27.9"19" rim4.4"8.1" wide
205/55R19 (solid) compared with 205/65R19 (dashed outline), drawn to scale

With 205/65R19 tires, when your speedometer says 60 mph you are really going

63.5 mph

205/65R19 is +1.61 inches (+5.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

205/55R19205/65R19Difference%
Overall diameter27.88"29.49"+1.61"+5.8%
Section width8.07"8.07"0.00"0.0%
Sidewall height4.44"5.25"+0.81"+18.2%
Circumference87.58"92.65"+5.07"+5.8%
Revolutions per mile723.4683.8−39.6−5.5%

Speedometer difference

If your vehicle came with 205/55R19 and you fit 205/65R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.2 mph+1.2 mph
30 mph31.7 mph+1.7 mph
40 mph42.3 mph+2.3 mph
50 mph52.9 mph+2.9 mph
60 mph63.5 mph+3.5 mph
65 mph68.8 mph+3.8 mph
70 mph74.1 mph+4.1 mph
75 mph79.3 mph+4.3 mph
80 mph84.6 mph+4.6 mph

Each size on its own

Questions

Which is bigger, 205/55R19 or 205/65R19?
205/65R19 is taller by 1.61 inches (29.49" vs 27.88"). 205/55R19 is the same width.
Can I replace 205/55R19 with 205/65R19?
It is not recommended without checking carefully. The diameter difference is +5.8%, 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 205/65R19 change my speedometer?
When your speedometer reads 60 mph with 205/65R19 fitted (calibrated for 205/55R19), your real speed is 63.5 mph. Your odometer will under-count miles by about 5.8%.
Will 205/65R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.81 inches of ground clearance at the axle.

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