275/45R20 tire size
A 275/45R20 tire stands 29.7 inches tall and 10.8 inches wide, with a 4.9-inch sidewall on a 20-inch rim.
- Overall height
- 29.7 in756 mm
- Section width
- 10.8 in275 mm
- Sidewall height
- 4.9 in124 mm
- Rim diameter
- 20 in508 mm
- Circumference
- 93.4 in2373 mm
- Revolutions per mile
- 678421 per km
- Inch size
- 29.7x10.8R20
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 275/45R20's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 255/50R20, 1.0% taller (0.30 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 275/45R20.
Other 20-inch sizes near 275/45R20
275 mm wide, other sidewalls
- 275/35R2027.6″
- 275/40R2028.7″
- 275/50R2030.8″
- 275/55R2031.9″
- 275/60R2033.0″
- 275/65R2034.1″
- 275/70R2035.2″
- 275/75R2036.2″
45 series, other widths
See the other sizes for this rim on 20-inch tire sizes.
Shop 275/45R20 tires
These open each store's own list of 275/45R20 tires, where you can filter by type, load and speed rating.
275/45R20 questions
How tall is a 275/45R20 tire?
About 29.7 inches (756 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.
What does 275/45R20 mean?
275 is the section width in millimetres (10.8 in). 45 means the sidewall is 45% of that width: 124 mm, or 4.9 in. R means radial construction, and 20 is the rim diameter in inches.
Can I use 255/50R20 instead of 275/45R20?
255/50R20 is 1.0% taller (0.30 in) and 20 mm narrower, which is inside the usual 3% rule. With it fitted, the speedometer shows 60 mph when you are doing 60.6 mph.
What is 275/45R20 in inches?
In inch terms it is 29.7x10.8R20: 29.7 inches tall, 10.8 inches wide, for a 20-inch rim.
How many revolutions per mile does a 275/45R20 make?
About 678 turns per mile, worked out from its unloaded circumference of 93.4 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.