Tire Size Box

325/60R19 vs 325/65R19

325/65R19 compared with 325/60R19

+3.7% diameter, 0.0" width

325/65R19 is 35.63" tall vs 34.35". More than the 3% rule of thumb, so check carefully before switching.

34.4"19" rim7.7"12.8" wide
325/60R19 (solid) compared with 325/65R19 (dashed outline), drawn to scale

With 325/65R19 tires, when your speedometer says 60 mph you are really going

62.2 mph

325/65R19 is +1.28 inches (+3.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

325/60R19325/65R19Difference%
Overall diameter34.35"35.63"+1.28"+3.7%
Section width12.80"12.80"0.00"0.0%
Sidewall height7.68"8.32"+0.64"+8.3%
Circumference107.93"111.95"+4.02"+3.7%
Revolutions per mile587.1566.0−21.1−3.6%

Speedometer difference

If your vehicle came with 325/60R19 and you fit 325/65R19, 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 mph41.5 mph+1.5 mph
50 mph51.9 mph+1.9 mph
60 mph62.2 mph+2.2 mph
65 mph67.4 mph+2.4 mph
70 mph72.6 mph+2.6 mph
75 mph77.8 mph+2.8 mph
80 mph83.0 mph+3.0 mph

Each size on its own

Questions

Which is bigger, 325/60R19 or 325/65R19?
325/65R19 is taller by 1.28 inches (35.63" vs 34.35"). 325/60R19 is the same width.
Can I replace 325/60R19 with 325/65R19?
It is not recommended without checking carefully. The diameter difference is +3.7%, 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 325/65R19 change my speedometer?
When your speedometer reads 60 mph with 325/65R19 fitted (calibrated for 325/60R19), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.7%.
Will 325/65R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.64 inches of ground clearance at the axle.

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