Tire Size Box

245/80R14 vs 265/80R14

265/80R14 compared with 245/80R14

+4.3% diameter, +0.8" width

265/80R14 is 30.69" tall vs 29.43". More than the 3% rule of thumb, so check carefully before switching.

29.4"14" rim7.7"9.6" wide
245/80R14 (solid) compared with 265/80R14 (dashed outline), drawn to scale

With 265/80R14 tires, when your speedometer says 60 mph you are really going

62.6 mph

265/80R14 is +1.26 inches (+4.3%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/80R14265/80R14Difference%
Overall diameter29.43"30.69"+1.26"+4.3%
Section width9.65"10.43"+0.79"+8.2%
Sidewall height7.72"8.35"+0.63"+8.2%
Circumference92.47"96.42"+3.96"+4.3%
Revolutions per mile685.2657.1−28.1−4.1%

Speedometer difference

If your vehicle came with 245/80R14 and you fit 265/80R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.9 mph+0.9 mph
30 mph31.3 mph+1.3 mph
40 mph41.7 mph+1.7 mph
50 mph52.1 mph+2.1 mph
60 mph62.6 mph+2.6 mph
65 mph67.8 mph+2.8 mph
70 mph73.0 mph+3.0 mph
75 mph78.2 mph+3.2 mph
80 mph83.4 mph+3.4 mph

Each size on its own

Questions

Which is bigger, 245/80R14 or 265/80R14?
265/80R14 is taller by 1.26 inches (30.69" vs 29.43"). 265/80R14 is wider by 0.79 inches.
Can I replace 245/80R14 with 265/80R14?
It is not recommended without checking carefully. The diameter difference is +4.3%, 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 265/80R14 change my speedometer?
When your speedometer reads 60 mph with 265/80R14 fitted (calibrated for 245/80R14), your real speed is 62.6 mph. Your odometer will under-count miles by about 4.3%.
Will 265/80R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.63 inches of ground clearance at the axle.

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