Tire Size Box

245/50R17 vs 245/60R17

245/60R17 compared with 245/50R17

+7.2% diameter, 0.0" width

245/60R17 is 28.57" tall vs 26.65". More than the 3% rule of thumb, so check carefully before switching.

26.6"17" rim4.8"9.6" wide
245/50R17 (solid) compared with 245/60R17 (dashed outline), drawn to scale

With 245/60R17 tires, when your speedometer says 60 mph you are really going

64.3 mph

245/60R17 is +1.93 inches (+7.2%) in overall diameter. That is more than the 3% most shops and makers recommend.

245/50R17245/60R17Difference%
Overall diameter26.65"28.57"+1.93"+7.2%
Section width9.65"9.65"0.00"0.0%
Sidewall height4.82"5.79"+0.96"+20.0%
Circumference83.71"89.77"+6.06"+7.2%
Revolutions per mile756.9705.8−51.1−6.8%

Speedometer difference

If your vehicle came with 245/50R17 and you fit 245/60R17, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.4 mph+1.4 mph
30 mph32.2 mph+2.2 mph
40 mph42.9 mph+2.9 mph
50 mph53.6 mph+3.6 mph
60 mph64.3 mph+4.3 mph
65 mph69.7 mph+4.7 mph
70 mph75.1 mph+5.1 mph
75 mph80.4 mph+5.4 mph
80 mph85.8 mph+5.8 mph

Each size on its own

Questions

Which is bigger, 245/50R17 or 245/60R17?
245/60R17 is taller by 1.93 inches (28.57" vs 26.65"). 245/50R17 is the same width.
Can I replace 245/50R17 with 245/60R17?
It is not recommended without checking carefully. The diameter difference is +7.2%, 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 245/60R17 change my speedometer?
When your speedometer reads 60 mph with 245/60R17 fitted (calibrated for 245/50R17), your real speed is 64.3 mph. Your odometer will under-count miles by about 7.2%.
Will 245/60R17 lift my vehicle?
Ride height changes by half the diameter difference: +0.96 inches of ground clearance at the axle.

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