285/60r18 vs 255/50r20 Tire Size Comparison


Tire Size Comparison Visualizer
Tire 1 Side View
Tire 1 Wheel
2509
18"
171
398 Revs/km
Tire 2 Side View
Tire 2 Wheel
2396
20"
128
417 Revs/km
Tire 1 Front View
285
799
Tire 2 Front View
255
763
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Speedometer Error
(Set Size1 to OEM Size)

Speed 10 km/h30 km/h50 km/h70 km/h90 km/h110 km/h130 km/h150 km/h
Actual 9.528.547.566.585.5104.5123.5142.5
Speed Diff-0.5-1.5-2.5-3.5-4.5-5.5-6.5-7.5

Ground Clearance Decreased by 18

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See how the 285/60r18 tire size compares to the 255/50r20

Making a decision before buying the right tire size? Or maybe you want new aftermarket tires?

The comparison charts above represent detailed calculations of the difference in size between 285/60r18 and 255/50r20 tires.

The resulting calculations of tire diameter and width, sidewall height, circumference and rim diameter are provided in the form of comparison table and visual graphics to better convey the difference between 285/60r18 and 255/50r20 tire sizes.

On top of that, given the fact that 285/60r18 is the original equipment tire size, you may also emulate the difference between your actual speed and speedometer readings after installing the 255/50r20 tires. Chances are high that you will want to calibrate your speedometer!

Other sizes often compared:

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