Tire Size Box

245/60R16 vs 245/70R16

245/70R16 compared with 245/60R16

+7.0% diameter, 0.0" width

245/70R16 is 29.50" 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 245/70R16 (dashed outline), drawn to scale

With 245/70R16 tires, when your speedometer says 60 mph you are really going

64.2 mph

245/70R16 is +1.93 inches (+7.0%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/60R16245/70R16Difference%
Overall diameter27.57"29.50"+1.93"+7.0%
Section width9.65"9.65"0.00"0.0%
Sidewall height5.79"6.75"+0.96"+16.7%
Circumference86.63"92.69"+6.06"+7.0%
Revolutions per mile731.4683.6−47.8−6.5%

Speedometer difference

If your vehicle came with 245/60R16 and you fit 245/70R16, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.1 mph+2.1 mph
40 mph42.8 mph+2.8 mph
50 mph53.5 mph+3.5 mph
60 mph64.2 mph+4.2 mph
65 mph69.5 mph+4.5 mph
70 mph74.9 mph+4.9 mph
75 mph80.2 mph+5.2 mph
80 mph85.6 mph+5.6 mph

Each size on its own

Questions

Which is bigger, 245/60R16 or 245/70R16?
245/70R16 is taller by 1.93 inches (29.50" vs 27.57"). 245/60R16 is the same width.
Can I replace 245/60R16 with 245/70R16?
It is not recommended without checking carefully. The diameter difference is +7.0%, 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 245/70R16 change my speedometer?
When your speedometer reads 60 mph with 245/70R16 fitted (calibrated for 245/60R16), your real speed is 64.2 mph. Your odometer will under-count miles by about 7.0%.
Will 245/70R16 lift my vehicle?
Ride height changes by half the diameter difference: +0.96 inches of ground clearance at the axle.

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