My Tire Guide

275/55R20 tire size

A 275/55R20 tire stands 31.9 inches tall and 10.8 inches wide, with a 6.0-inch sidewall on a 20-inch rim.

31.9″OVERALL 31.9 IN · RIM 20 IN10.8″6.0″WIDTH · SIDEWALL
Overall height
31.9 in811 mm
Section width
10.8 in275 mm
Sidewall height
6.0 in151 mm
Rim diameter
20 in508 mm
Circumference
100.2 in2546 mm
Revolutions per mile
632393 per km
Inch size
31.9x10.8R20

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 275/55R20's overall height, the usual limit before the speedometer, ABS and transmission notice. The closest is 255/60R20, 0.4% taller (0.14 in). Wider sizes also need room in the wheel well and a rim width that suits them.

SizeHeightWidthAt 60 mph
255/60R20+0.4%+0.14 in−20 mm60.3 mph
295/50R20−0.9%−0.30 in+20 mm59.4 mph
265/55R20−1.4%−0.43 in−10 mm59.2 mph
285/55R20+1.4%+0.43 in+10 mm60.8 mph
265/60R20+1.9%+0.61 in−10 mm61.1 mph
285/50R20−2.2%−0.69 in+10 mm58.7 mph
295/55R20+2.7%+0.87 in+20 mm61.6 mph
255/55R20−2.7%−0.87 in−20 mm58.4 mph

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 275/55R20.

SizeHeightWidthAt 60 mph
295/60R18+0.1%+0.03 in+20 mm60.1 mph
275/60R19+0.3%+0.08 in±0 mm60.2 mph
275/50R21−0.3%−0.08 in±0 mm59.8 mph
255/50R22+0.4%+0.13 in−20 mm60.2 mph

275/55R20 compared

LT275/55R20

LT275/55R20 is the light-truck version of this size, with the same nominal height and width: 31.9 by 10.8 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 275/55R20

275 mm wide, other sidewalls

55 series, other widths

See the other sizes for this rim on 20-inch tire sizes.

Shop 275/55R20 tires

These open each store's own list of 275/55R20 tires, where you can filter by type, load and speed rating.

275/55R20 questions

How tall is a 275/55R20 tire?

About 31.9 inches (811 mm) from the ground to the top of the tread, unloaded. On the vehicle, carrying weight, it sits a little lower.

What does 275/55R20 mean?

275 is the section width in millimetres (10.8 in). 55 means the sidewall is 55% of that width: 151 mm, or 6.0 in. R means radial construction, and 20 is the rim diameter in inches.

Is LT275/55R20 the same size as 275/55R20?

Yes, they share the same nominal size: 31.9 inches tall and 10.8 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 255/60R20 instead of 275/55R20?

255/60R20 is 0.4% taller (0.14 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 275/55R20 in inches?

In inch terms it is 31.9x10.8R20: 31.9 inches tall, 10.8 inches wide, for a 20-inch rim.

How many revolutions per mile does a 275/55R20 make?

About 632 turns per mile, worked out from its unloaded circumference of 100.2 inches. Makers list slightly higher numbers for their own tires, because a loaded tire rolls on a smaller radius.