Tire Size Box

275/55R17 vs 275/60R17

275/60R17 compared with 275/55R17

+3.7% diameter, 0.0" width

275/60R17 is 29.99" tall vs 28.91". More than the 3% rule of thumb, so check carefully before switching.

28.9"17" rim6.0"10.8" wide
275/55R17 (solid) compared with 275/60R17 (dashed outline), drawn to scale

With 275/60R17 tires, when your speedometer says 60 mph you are really going

62.2 mph

275/60R17 is +1.08 inches (+3.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

275/55R17275/60R17Difference%
Overall diameter28.91"29.99"+1.08"+3.7%
Section width10.83"10.83"0.00"0.0%
Sidewall height5.95"6.50"+0.54"+9.1%
Circumference90.82"94.22"+3.40"+3.7%
Revolutions per mile697.6672.4−25.2−3.6%

Speedometer difference

If your vehicle came with 275/55R17 and you fit 275/60R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph20.7 mph+0.7 mph
30 mph31.1 mph+1.1 mph
40 mph41.5 mph+1.5 mph
50 mph51.9 mph+1.9 mph
60 mph62.2 mph+2.2 mph
65 mph67.4 mph+2.4 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, 275/55R17 or 275/60R17?
275/60R17 is taller by 1.08 inches (29.99" vs 28.91"). 275/55R17 is the same width.
Can I replace 275/55R17 with 275/60R17?
It is not recommended without checking carefully. The diameter difference is +3.7%, 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 275/60R17 change my speedometer?
When your speedometer reads 60 mph with 275/60R17 fitted (calibrated for 275/55R17), your real speed is 62.2 mph. Your odometer will under-count miles by about 3.7%.
Will 275/60R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.54 inches of ground clearance at the axle.

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