255/55R20 tire size
A 255/55R20 tire stands 31.0 inches tall and 10.0 inches wide, with a 5.5-inch sidewall on a 20-inch rim.
- Overall height
- 31.0 in789 mm
- Section width
- 10.0 in255 mm
- Sidewall height
- 5.5 in140 mm
- Rim diameter
- 20 in508 mm
- Circumference
- 97.5 in2477 mm
- Revolutions per mile
- 650404 per km
- Inch size
- 31.0x10.0R20
Compare it with any other size in the tire size calculator.
Sizes you can swap to
These 20-inch sizes are within two width steps and 3% of a 255/55R20's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 235/60R20, 0.2% taller (0.06 in). Wider sizes also need room in the wheel well and a rim width that suits them.
Plus and minus sizes
Changing rim size means changing the sidewall to keep the same overall height. On 18-inch or 19-inch or 21-inch or 22-inch rims, these are the closest matches to a 255/55R20.
Other 20-inch sizes near 255/55R20
255 mm wide, other sidewalls
55 series, other widths
See the other sizes for this rim on 20-inch tire sizes, or other tires about this tall on 31-inch tires.
Shop 255/55R20 tires
These open each store's own list of 255/55R20 tires, where you can filter by type, load and speed rating.
255/55R20 questions
How tall is a 255/55R20 tire?
About 31.0 inches (789 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 255/55R20 mean?
255 is the section width in millimetres (10.0 in). 55 means the sidewall is 55% of that width: 140 mm, or 5.5 in. R means radial construction, and 20 is the rim diameter in inches.
Can I use 275/50R20 instead of 255/55R20?
275/50R20 is 0.7% shorter (0.22 in) and 20 mm wider, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 59.6 mph. Make sure the extra width clears the suspension and fender liner at full lock.
What is 255/55R20 in inches?
In inch terms it is 31.0x10.0R20: 31.0 inches tall, 10.0 inches wide, for a 20-inch rim.
How many revolutions per mile does a 255/55R20 make?
About 650 turns per mile, worked out from its unloaded circumference of 97.5 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.