Tire Size Box

265/75R14 vs 265/80R14

265/80R14 compared with 265/75R14

+3.5% diameter, 0.0" width

265/80R14 is 30.69" tall vs 29.65". More than the 3% rule of thumb, so check carefully before switching.

29.6"14" rim7.8"10.4" wide
265/75R14 (solid) compared with 265/80R14 (dashed outline), drawn to scale

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

62.1 mph

265/80R14 is +1.04 inches (+3.5%) in overall diameter. That is more than the 3% most shops and makers recommend.

265/75R14265/80R14Difference%
Overall diameter29.65"30.69"+1.04"+3.5%
Section width10.43"10.43"0.00"0.0%
Sidewall height7.82"8.35"+0.52"+6.7%
Circumference93.15"96.42"+3.28"+3.5%
Revolutions per mile680.2657.1−23.1−3.4%

Speedometer difference

If your vehicle came with 265/75R14 and you fit 265/80R14, 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 mph41.4 mph+1.4 mph
50 mph51.8 mph+1.8 mph
60 mph62.1 mph+2.1 mph
65 mph67.3 mph+2.3 mph
70 mph72.5 mph+2.5 mph
75 mph77.6 mph+2.6 mph
80 mph82.8 mph+2.8 mph

Each size on its own

Questions

Which is bigger, 265/75R14 or 265/80R14?
265/80R14 is taller by 1.04 inches (30.69" vs 29.65"). 265/75R14 is the same width.
Can I replace 265/75R14 with 265/80R14?
It is not recommended without checking carefully. The diameter difference is +3.5%, 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 265/75R14), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.5%.
Will 265/80R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.52 inches of ground clearance at the axle.

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