155/65R13 tire size

A 155/65R13 tire is 20.93 inches (531.7 mm) tall, 6.10 in (155 mm) wide and fits a 13-inch wheel. In inch notation it is roughly a 20.9x6.1R13.

155/65R13 dimensions
Overall diameter20.93 in531.7 mm
Section width6.10 in155 mm
Sidewall height3.97 in100.8 mm
Circumference65.76 in1,670 mm
Revolutions963.5 per mile598.7 per km
Rim diameter13 in330.2 mm

Compare 155/65R13 with another size

Speed in

Overall diameter difference

+0.28%

60 mph on the speedometer = 60.2 mph actual

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

Ground clearance
+0.8 mm (+0.03 in)
Revolutions
963 → 961 per mile

155/65R13 145/70R13

Side-by-side dimensions

CurrentNewDifference%
Diameter20.93 in20.99 in+0.06 in+0.28%
Diameter531.7 mm533.2 mm+1.5 mm+0.28%
Width6.10 in5.71 in−0.39 in−6.45%
Width155.0 mm145.0 mm−10.0 mm−6.45%
Sidewall3.97 in4.00 in+0.03 in+0.74%
Sidewall100.8 mm101.5 mm+0.8 mm+0.74%
Circumference65.76 in65.95 in+0.19 in+0.28%
Revs per mile963.5 960.7 −2.7 −0.28%

Speedometer error

Speedometer showsActual speedDifference
20 mph20.1 mph+0.1 mph
30 mph30.1 mph+0.1 mph
40 mph40.1 mph+0.1 mph
50 mph50.1 mph+0.1 mph
60 mph60.2 mph+0.2 mph
70 mph70.2 mph+0.2 mph
80 mph80.2 mph+0.2 mph

Alternative sizes on the same 13-inch wheel

Sizes in use within ±3 % of the overall diameter of 155/65R13:

Plus and minus sizes for 155/65R13

SizeWheelDiameterDifference
175/50R14Plus 1 (14 in)20.89 in−0.21%
165/55R14Plus 1 (14 in)21.15 in+1.02%

Vehicles approved with 155/65R13 tires

Models whose Swiss type approval lists 155/65R13 as a standard or optional size (44 approvals in total). Always check your own vehicle's placard or papers.

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 13-inch sizes

Reading the 155/65R13 size

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.