Tire Size Box

245/65R19 vs 265/65R19

265/65R19 compared with 245/65R19

+3.2% diameter, +0.8" width

265/65R19 is 32.56" tall vs 31.54". More than the 3% rule of thumb, so check carefully before switching.

31.5"19" rim6.3"9.6" wide
245/65R19 (solid) compared with 265/65R19 (dashed outline), drawn to scale

With 265/65R19 tires, when your speedometer says 60 mph you are really going

61.9 mph

265/65R19 is +1.02 inches (+3.2%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/65R19265/65R19Difference%
Overall diameter31.54"32.56"+1.02"+3.2%
Section width9.65"10.43"+0.79"+8.2%
Sidewall height6.27"6.78"+0.51"+8.2%
Circumference99.08"102.30"+3.22"+3.2%
Revolutions per mile639.5619.4−20.1−3.1%

Speedometer difference

If your vehicle came with 245/65R19 and you fit 265/65R19, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.6 mph+0.6 mph
30 mph31.0 mph+1.0 mph
40 mph41.3 mph+1.3 mph
50 mph51.6 mph+1.6 mph
60 mph61.9 mph+1.9 mph
65 mph67.1 mph+2.1 mph
70 mph72.3 mph+2.3 mph
75 mph77.4 mph+2.4 mph
80 mph82.6 mph+2.6 mph

Each size on its own

Questions

Which is bigger, 245/65R19 or 265/65R19?
265/65R19 is taller by 1.02 inches (32.56" vs 31.54"). 265/65R19 is wider by 0.79 inches.
Can I replace 245/65R19 with 265/65R19?
It is not recommended without checking carefully. The diameter difference is +3.2%, 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 265/65R19 change my speedometer?
When your speedometer reads 60 mph with 265/65R19 fitted (calibrated for 245/65R19), your real speed is 61.9 mph. Your odometer will under-count miles by about 3.2%.
Will 265/65R19 lift my vehicle?
Ride height changes by half the diameter difference: +0.51 inches of ground clearance at the axle.

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