Tire Size Box

245/60R14 vs 245/65R14

245/65R14 compared with 245/60R14

+3.8% diameter, 0.0" width

245/65R14 is 26.54" tall vs 25.57". More than the 3% rule of thumb, so check carefully before switching.

25.6"14" rim5.8"9.6" wide
245/60R14 (solid) compared with 245/65R14 (dashed outline), drawn to scale

With 245/65R14 tires, when your speedometer says 60 mph you are really going

62.3 mph

245/65R14 is +0.96 inches (+3.8%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/60R14245/65R14Difference%
Overall diameter25.57"26.54"+0.96"+3.8%
Section width9.65"9.65"0.00"0.0%
Sidewall height5.79"6.27"+0.48"+8.3%
Circumference80.35"83.38"+3.03"+3.8%
Revolutions per mile788.6759.9−28.7−3.6%

Speedometer difference

If your vehicle came with 245/60R14 and you fit 245/65R14, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.8 mph+0.8 mph
30 mph31.1 mph+1.1 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 mph72.6 mph+2.6 mph
75 mph77.8 mph+2.8 mph
80 mph83.0 mph+3.0 mph

Each size on its own

Questions

Which is bigger, 245/60R14 or 245/65R14?
245/65R14 is taller by 0.96 inches (26.54" vs 25.57"). 245/60R14 is the same width.
Can I replace 245/60R14 with 245/65R14?
It is not recommended without checking carefully. The diameter difference is +3.8%, 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 245/65R14 change my speedometer?
When your speedometer reads 60 mph with 245/65R14 fitted (calibrated for 245/60R14), your real speed is 62.3 mph. Your odometer will under-count miles by about 3.8%.
Will 245/65R14 lift my vehicle?
Ride height changes by half the diameter difference: +0.48 inches of ground clearance at the axle.

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