Tire Size Box

245/85R14 vs 265/85R14

265/85R14 compared with 245/85R14

+4.4% diameter, +0.8" width

265/85R14 is 31.74" tall vs 30.40". More than the 3% rule of thumb, so check carefully before switching.

30.4"14" rim8.2"9.6" wide
245/85R14 (solid) compared with 265/85R14 (dashed outline), drawn to scale

With 265/85R14 tires, when your speedometer says 60 mph you are really going

62.6 mph

265/85R14 is +1.34 inches (+4.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/85R14265/85R14Difference%
Overall diameter30.40"31.74"+1.34"+4.4%
Section width9.65"10.43"+0.79"+8.2%
Sidewall height8.20"8.87"+0.67"+8.2%
Circumference95.50"99.70"+4.21"+4.4%
Revolutions per mile663.5635.5−28.0−4.2%

Speedometer difference

If your vehicle came with 245/85R14 and you fit 265/85R14, 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 mph41.8 mph+1.8 mph
50 mph52.2 mph+2.2 mph
60 mph62.6 mph+2.6 mph
65 mph67.9 mph+2.9 mph
70 mph73.1 mph+3.1 mph
75 mph78.3 mph+3.3 mph
80 mph83.5 mph+3.5 mph

Each size on its own

Questions

Which is bigger, 245/85R14 or 265/85R14?
265/85R14 is taller by 1.34 inches (31.74" vs 30.40"). 265/85R14 is wider by 0.79 inches.
Can I replace 245/85R14 with 265/85R14?
It is not recommended without checking carefully. The diameter difference is +4.4%, 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 265/85R14 change my speedometer?
When your speedometer reads 60 mph with 265/85R14 fitted (calibrated for 245/85R14), your real speed is 62.6 mph. Your odometer will under-count miles by about 4.4%.
Will 265/85R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.67 inches of ground clearance at the axle.

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