Tire Size Box

195/50R18 vs 195/60R18

195/60R18 compared with 195/50R18

+6.0% diameter, 0.0" width

195/60R18 is 27.21" tall vs 25.68". More than the 3% rule of thumb, so check carefully before switching.

25.7"18" rim3.8"7.7" wide
195/50R18 (solid) compared with 195/60R18 (dashed outline), drawn to scale

With 195/60R18 tires, when your speedometer says 60 mph you are really going

63.6 mph

195/60R18 is +1.54 inches (+6.0%) in overall diameter. That is more than the 3% most shops and makers recommend.

195/50R18195/60R18Difference%
Overall diameter25.68"27.21"+1.54"+6.0%
Section width7.68"7.68"0.00"0.0%
Sidewall height3.84"4.61"+0.77"+20.0%
Circumference80.67"85.49"+4.82"+6.0%
Revolutions per mile785.4741.1−44.3−5.6%

Speedometer difference

If your vehicle came with 195/50R18 and you fit 195/60R18, here is your real speed for each speedometer reading:

Speedometer showsActual speedDifference
20 mph21.2 mph+1.2 mph
30 mph31.8 mph+1.8 mph
40 mph42.4 mph+2.4 mph
50 mph53.0 mph+3.0 mph
60 mph63.6 mph+3.6 mph
65 mph68.9 mph+3.9 mph
70 mph74.2 mph+4.2 mph
75 mph79.5 mph+4.5 mph
80 mph84.8 mph+4.8 mph

Each size on its own

Questions

Which is bigger, 195/50R18 or 195/60R18?
195/60R18 is taller by 1.54 inches (27.21" vs 25.68"). 195/50R18 is the same width.
Can I replace 195/50R18 with 195/60R18?
It is not recommended without checking carefully. The diameter difference is +6.0%, 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 195/60R18 change my speedometer?
When your speedometer reads 60 mph with 195/60R18 fitted (calibrated for 195/50R18), your real speed is 63.6 mph. Your odometer will under-count miles by about 6.0%.
Will 195/60R18 lift my vehicle?
Ride height changes by half the diameter difference: +0.77 inches of ground clearance at the axle.

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