285/55R20 tire size
A 285/55R20 tire stands 32.3 inches tall and 11.2 inches wide, with a 6.2-inch sidewall on a 20-inch rim.
- Overall height
- 32.3 in822 mm
- Section width
- 11.2 in285 mm
- Sidewall height
- 6.2 in157 mm
- Rim diameter
- 20 in508 mm
- Circumference
- 101.6 in2581 mm
- Revolutions per mile
- 624387 per km
- Inch size
- 32.3x11.2R20
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 285/55R20's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 265/60R20, 0.5% taller (0.18 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 285/55R20.
285/55R20 compared
LT285/55R20
LT285/55R20 is the light-truck version of this size, with the same nominal height and width: 32.3 by 11.2 inches. LT tires have stiffer construction for heavier loads and towing, run at higher pressures and carry a load range (C, D, E or F) instead of a passenger load rating. Fit LT tires where the door placard calls for them or the truck works hard; on a light-duty vehicle they ride firmer than the P-metric size.
Other 20-inch sizes near 285/55R20
285 mm wide, other sidewalls
- 285/35R2027.9″
- 285/40R2029.0″
- 285/45R2030.1″
- 285/50R2031.2″
- 285/60R2033.5″
- 285/65R2034.6″
- 285/70R2035.7″
- 285/75R2036.8″
55 series, other widths
See the other sizes for this rim on 20-inch tire sizes.
Shop 285/55R20 tires
These open each store's own list of 285/55R20 tires, where you can filter by type, load and speed rating.
285/55R20 questions
How tall is a 285/55R20 tire?
About 32.3 inches (822 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 285/55R20 mean?
285 is the section width in millimetres (11.2 in). 55 means the sidewall is 55% of that width: 157 mm, or 6.2 in. R means radial construction, and 20 is the rim diameter in inches.
Is LT285/55R20 the same size as 285/55R20?
Yes, they share the same nominal size: 32.3 inches tall and 11.2 inches wide. The difference is construction. LT tires are built for heavier loads at higher pressures and carry a load range letter (C, D, E or F); they ride firmer than passenger tires.
Can I use 265/60R20 instead of 285/55R20?
265/60R20 is 0.5% taller (0.18 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.3 mph.
What is 285/55R20 in inches?
In inch terms it is 32.3x11.2R20: 32.3 inches tall, 11.2 inches wide, for a 20-inch rim.
How many revolutions per mile does a 285/55R20 make?
About 624 turns per mile, worked out from its unloaded circumference of 101.6 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.