Tire Size Box

245/65R14 vs 265/65R14

265/65R14 compared with 245/65R14

+3.9% diameter, +0.8" width

265/65R14 is 27.56" tall vs 26.54". More than the 3% rule of thumb, so check carefully before switching.

26.5"14" rim6.3"9.6" wide
245/65R14 (solid) compared with 265/65R14 (dashed outline), drawn to scale

With 265/65R14 tires, when your speedometer says 60 mph you are really going

62.3 mph

265/65R14 is +1.02 inches (+3.9%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/65R14265/65R14Difference%
Overall diameter26.54"27.56"+1.02"+3.9%
Section width9.65"10.43"+0.79"+8.2%
Sidewall height6.27"6.78"+0.51"+8.2%
Circumference83.38"86.59"+3.22"+3.9%
Revolutions per mile759.9731.7−28.2−3.7%

Speedometer difference

If your vehicle came with 245/65R14 and you fit 265/65R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.8 mph+0.8 mph
30 mph31.2 mph+1.2 mph
40 mph41.5 mph+1.5 mph
50 mph51.9 mph+1.9 mph
60 mph62.3 mph+2.3 mph
65 mph67.5 mph+2.5 mph
70 mph72.7 mph+2.7 mph
75 mph77.9 mph+2.9 mph
80 mph83.1 mph+3.1 mph

Each size on its own

Questions

Which is bigger, 245/65R14 or 265/65R14?
265/65R14 is taller by 1.02 inches (27.56" vs 26.54"). 265/65R14 is wider by 0.79 inches.
Can I replace 245/65R14 with 265/65R14?
It is not recommended without checking carefully. The diameter difference is +3.9%, 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 265/65R14 change my speedometer?
When your speedometer reads 60 mph with 265/65R14 fitted (calibrated for 245/65R14), your real speed is 62.3 mph. Your odometer will under-count miles by about 3.9%.
Will 265/65R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.51 inches of ground clearance at the axle.

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