Tire Size Box

255/50R16 vs 255/60R16

255/60R16 compared with 255/50R16

+7.7% diameter, 0.0" width

255/60R16 is 28.05" tall vs 26.04". More than the 3% rule of thumb, so check carefully before switching.

26.0"16" rim5.0"10.0" wide
255/50R16 (solid) compared with 255/60R16 (dashed outline), drawn to scale

With 255/60R16 tires, when your speedometer says 60 mph you are really going

64.6 mph

255/60R16 is +2.01 inches (+7.7%) in overall diameter. That is more than the 3% most shops and makers recommend.

255/50R16255/60R16Difference%
Overall diameter26.04"28.05"+2.01"+7.7%
Section width10.04"10.04"0.00"0.0%
Sidewall height5.02"6.02"+1.00"+20.0%
Circumference81.81"88.11"+6.31"+7.7%
Revolutions per mile774.5719.1−55.4−7.2%

Speedometer difference

If your vehicle came with 255/50R16 and you fit 255/60R16, 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 mph43.1 mph+3.1 mph
50 mph53.9 mph+3.9 mph
60 mph64.6 mph+4.6 mph
65 mph70.0 mph+5.0 mph
70 mph75.4 mph+5.4 mph
75 mph80.8 mph+5.8 mph
80 mph86.2 mph+6.2 mph

Each size on its own

Questions

Which is bigger, 255/50R16 or 255/60R16?
255/60R16 is taller by 2.01 inches (28.05" vs 26.04"). 255/50R16 is the same width.
Can I replace 255/50R16 with 255/60R16?
It is not recommended without checking carefully. The diameter difference is +7.7%, 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 255/60R16 change my speedometer?
When your speedometer reads 60 mph with 255/60R16 fitted (calibrated for 255/50R16), your real speed is 64.6 mph. Your odometer will under-count miles by about 7.7%.
Will 255/60R16 lift my vehicle?
Ride height changes by half the diameter difference: +1.00 inches of ground clearance at the axle.

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