Tire Size Box

245/60R16 vs 265/60R16

265/60R16 compared with 245/60R16

+3.4% diameter, +0.8" width

265/60R16 is 28.52" tall vs 27.57". More than the 3% rule of thumb, so check carefully before switching.

27.6"16" rim5.8"9.6" wide
245/60R16 (solid) compared with 265/60R16 (dashed outline), drawn to scale

With 265/60R16 tires, when your speedometer says 60 mph you are really going

62.1 mph

265/60R16 is +0.94 inches (+3.4%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/60R16265/60R16Difference%
Overall diameter27.57"28.52"+0.94"+3.4%
Section width9.65"10.43"+0.79"+8.2%
Sidewall height5.79"6.26"+0.47"+8.2%
Circumference86.63"89.60"+2.97"+3.4%
Revolutions per mile731.4707.2−24.2−3.3%

Speedometer difference

If your vehicle came with 245/60R16 and you fit 265/60R16, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.0 mph+1.0 mph
40 mph41.4 mph+1.4 mph
50 mph51.7 mph+1.7 mph
60 mph62.1 mph+2.1 mph
65 mph67.2 mph+2.2 mph
70 mph72.4 mph+2.4 mph
75 mph77.6 mph+2.6 mph
80 mph82.7 mph+2.7 mph

Each size on its own

Questions

Which is bigger, 245/60R16 or 265/60R16?
265/60R16 is taller by 0.94 inches (28.52" vs 27.57"). 265/60R16 is wider by 0.79 inches.
Can I replace 245/60R16 with 265/60R16?
It is not recommended without checking carefully. The diameter difference is +3.4%, 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 265/60R16 change my speedometer?
When your speedometer reads 60 mph with 265/60R16 fitted (calibrated for 245/60R16), your real speed is 62.1 mph. Your odometer will under-count miles by about 3.4%.
Will 265/60R16 lift my vehicle?
Ride height changes by half the diameter difference: +0.47 inches of ground clearance at the axle.

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