285/45R20 tire size
A 285/45R20 tire stands 30.1 inches tall and 11.2 inches wide, with a 5.0-inch sidewall on a 20-inch rim.
- Overall height
- 30.1 in765 mm
- Section width
- 11.2 in285 mm
- Sidewall height
- 5.0 in128 mm
- Rim diameter
- 20 in508 mm
- Circumference
- 94.6 in2402 mm
- Revolutions per mile
- 670416 per km
- Inch size
- 30.1x11.2R20
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 285/45R20's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 265/50R20, 1.1% taller (0.33 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 285/45R20.
Other 20-inch sizes near 285/45R20
285 mm wide, other sidewalls
- 285/35R2027.9″
- 285/40R2029.0″
- 285/50R2031.2″
- 285/55R2032.3″
- 285/60R2033.5″
- 285/65R2034.6″
- 285/70R2035.7″
- 285/75R2036.8″
45 series, other widths
See the other sizes for this rim on 20-inch tire sizes.
Shop 285/45R20 tires
These open each store's own list of 285/45R20 tires, where you can filter by type, load and speed rating.
285/45R20 questions
How tall is a 285/45R20 tire?
About 30.1 inches (765 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 285/45R20 mean?
285 is the section width in millimetres (11.2 in). 45 means the sidewall is 45% of that width: 128 mm, or 5.0 in. R means radial construction, and 20 is the rim diameter in inches.
Can I use 265/50R20 instead of 285/45R20?
265/50R20 is 1.1% taller (0.33 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.7 mph.
What is 285/45R20 in inches?
In inch terms it is 30.1x11.2R20: 30.1 inches tall, 11.2 inches wide, for a 20-inch rim.
How many revolutions per mile does a 285/45R20 make?
About 670 turns per mile, worked out from its unloaded circumference of 94.6 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.