255/50R20 in inches

A 255/50R20 tire stands 30.0 inches tall and is 10.0 inches wide. It fits a 20-inch wheel. People usually call it a 30-inch tire.

Tall

30.0″

763 mm

Wide

10.0″

255 mm

Wheel

20″

rim diameter

Compare with another size

Cars that come with 255/50R20

Similar-height sizes

Within 3% of 255/50R20, so your speedometer stays close.

Size	Height	vs 255/50R20
255/60R18	30.0″	+0.0%needs 18″ wheels	Compare
235/65R18	30.0″	−0.0%needs 18″ wheels	Compare
255/70R16	30.1″	+0.1%needs 16″ wheels	Compare
235/55R20	30.2″	+0.5%	Compare
245/50R20	29.6″	−1.3%	Compare
265/50R20	30.4″	+1.3%	Compare
295/45R20	30.5″	+1.4%	Compare
245/55R19	29.6″	−1.4%needs 19″ wheels	Compare

How 255/50R20 is measured

Measurement	Inches	Millimetres
Overall height (diameter)	30.04	763
Tread width	10.04	255
Sidewall height	5.02	127
Distance per turn (circumference)	94.4	2397
Turns per mile	671

The first number (255) is the width in millimetres. The second (50) means the sidewall is 50% as tall as the tire is wide. The last (20) is the wheel size in inches. More on reading a tire size.