275/55R17 tire size

A 275/55R17 tire is 28.91 inches (734.3 mm) tall, 10.83 in (275 mm) wide and fits a 17-inch wheel. In inch notation it is roughly a 28.9x10.8R17 — a "29-inch" tire.

275/55R17 dimensions
Overall diameter	28.91 in	734.3 mm
Section width	10.83 in	275 mm
Sidewall height	5.95 in	151.3 mm
Circumference	90.82 in	2,307 mm
Revolutions	697.6 per mile	433.5 per km
Rim diameter	17 in	431.8 mm

Compare 275/55R17 with another size

Current size

New size

Speed in mphkm/h

Overall diameter difference

+0.48%

60 mph on the speedometer = 60.3 mph actual

Within the ±3 % diameter range most tire fitters accept.

Ground clearance: +1.8 mm (+0.07 in)
Revolutions: 698 → 694 per mile

275/55R17 255/60R17

Side-by-side dimensions

	Current	New	Difference	%
Diameter	28.91 in	29.05 in	+0.14 in	+0.48%
Diameter	734.3 mm	737.8 mm	+3.5 mm	+0.48%
Width	10.83 in	10.04 in	−0.79 in	−7.27%
Width	275.0 mm	255.0 mm	−20.0 mm	−7.27%
Sidewall	5.95 in	6.02 in	+0.07 in	+1.16%
Sidewall	151.3 mm	153.0 mm	+1.8 mm	+1.16%
Circumference	90.82 in	91.25 in	+0.43 in	+0.48%
Revs per mile	697.6	694.3	−3.3	−0.47%

Speedometer error

Speedometer shows	Actual speed	Difference
20 mph	20.1 mph	+0.1 mph
30 mph	30.1 mph	+0.1 mph
40 mph	40.2 mph	+0.2 mph
50 mph	50.2 mph	+0.2 mph
60 mph	60.3 mph	+0.3 mph
70 mph	70.3 mph	+0.3 mph
80 mph	80.4 mph	+0.4 mph

Alternative sizes on the same 17-inch wheel

Sizes in use within ±3 % of the overall diameter of 275/55R17:

Plus and minus sizes for 275/55R17

Size	Wheel	Diameter	Difference
255/70R15	Minus 2 (15 in)	29.06 in	+0.50%
265/70R15	Minus 2 (15 in)	29.61 in	+2.41%
255/65R16	Minus 1 (16 in)	29.05 in	+0.49%
245/70R16	Minus 1 (16 in)	29.50 in	+2.06%
255/55R18	Plus 1 (18 in)	29.04 in	+0.46%
285/50R18	Plus 1 (18 in)	29.22 in	+1.08%
245/60R18	Plus 1 (18 in)	29.57 in	+2.30%
285/45R18	Plus 1 (18 in)	28.10 in	−2.81%
255/50R19	Plus 2 (19 in)	29.04 in	+0.45%
275/45R19	Plus 2 (19 in)	28.74 in	−0.57%
285/45R19	Plus 2 (19 in)	29.10 in	+0.65%
245/50R19	Plus 2 (19 in)	28.65 in	−0.91%
325/35R20	Plus 3 (20 in)	28.96 in	+0.16%
285/40R20	Plus 3 (20 in)	28.98 in	+0.23%
255/45R20	Plus 3 (20 in)	29.04 in	+0.44%
245/45R20	Plus 3 (20 in)	28.68 in	−0.79%

Vehicles approved with 275/55R17 tires

Models whose Swiss type approval lists 275/55R17 as a standard or optional size (17 approvals in total). Always check your own vehicle's placard or papers.

Mercedes-Benz ML

Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.

Nearby 17-inch sizes

Reading the 275/55R17 size

275 — section width in millimetres (10.83 in).
55 — aspect ratio: the sidewall is 55 % of the width, 151.3 mm.
R — radial construction (ZR on the sidewall means a high-speed rated radial; the dimensions are the same).
17 — fits a 17-inch diameter wheel.

The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.