Tire Size Box

265/60R15 vs 265/70R15

265/70R15 compared with 265/60R15

+7.6% diameter, 0.0" width

265/70R15 is 29.61" tall vs 27.52". More than the 3% rule of thumb, so check carefully before switching.

27.5"15" rim6.3"10.4" wide
265/60R15 (solid) compared with 265/70R15 (dashed outline), drawn to scale

With 265/70R15 tires, when your speedometer says 60 mph you are really going

64.5 mph

265/70R15 is +2.09 inches (+7.6%) in overall diameter. That is more than the 3% most shops and makers recommend.

265/60R15265/70R15Difference%
Overall diameter27.52"29.61"+2.09"+7.6%
Section width10.43"10.43"0.00"0.0%
Sidewall height6.26"7.30"+1.04"+16.7%
Circumference86.46"93.01"+6.56"+7.6%
Revolutions per mile732.9681.2−51.7−7.0%

Speedometer difference

If your vehicle came with 265/60R15 and you fit 265/70R15, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.5 mph+1.5 mph
30 mph32.3 mph+2.3 mph
40 mph43.0 mph+3.0 mph
50 mph53.8 mph+3.8 mph
60 mph64.5 mph+4.5 mph
65 mph69.9 mph+4.9 mph
70 mph75.3 mph+5.3 mph
75 mph80.7 mph+5.7 mph
80 mph86.1 mph+6.1 mph

Each size on its own

Questions

Which is bigger, 265/60R15 or 265/70R15?
265/70R15 is taller by 2.09 inches (29.61" vs 27.52"). 265/60R15 is the same width.
Can I replace 265/60R15 with 265/70R15?
It is not recommended without checking carefully. The diameter difference is +7.6%, 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 265/70R15 change my speedometer?
When your speedometer reads 60 mph with 265/70R15 fitted (calibrated for 265/60R15), your real speed is 64.5 mph. Your odometer will under-count miles by about 7.6%.
Will 265/70R15 lift my vehicle?
Ride height changes by half the diameter difference: +1.04 inches of ground clearance at the axle.

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