165/80R15 tire size

A 165/80R15 tire is 25.39 inches (645.0 mm) tall, 6.50 in (165 mm) wide and fits a 15-inch wheel. In inch notation it is roughly a 25.4x6.5R15.

165/80R15 dimensions
Overall diameter25.39 in645.0 mm
Section width6.50 in165 mm
Sidewall height5.20 in132.0 mm
Circumference79.78 in2,026 mm
Revolutions794.2 per mile493.5 per km
Rim diameter15 in381.0 mm

Compare 165/80R15 with another size

Speed in

Overall diameter difference

+0.39%

60 mph on the speedometer = 60.2 mph actual

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

Ground clearance
+1.3 mm (+0.05 in)
Revolutions
794 → 791 per mile

165/80R15 205/65R15

Side-by-side dimensions

CurrentNewDifference%
Diameter25.39 in25.49 in+0.10 in+0.39%
Diameter645.0 mm647.5 mm+2.5 mm+0.39%
Width6.50 in8.07 in+1.57 in+24.24%
Width165.0 mm205.0 mm+40.0 mm+24.24%
Sidewall5.20 in5.25 in+0.05 in+0.95%
Sidewall132.0 mm133.3 mm+1.3 mm+0.95%
Circumference79.78 in80.09 in+0.31 in+0.39%
Revs per mile794.2 791.2 −3.1 −0.39%

Speedometer error

Speedometer showsActual speedDifference
20 mph20.1 mph+0.1 mph
30 mph30.1 mph+0.1 mph
40 mph40.2 mph+0.2 mph
50 mph50.2 mph+0.2 mph
60 mph60.2 mph+0.2 mph
70 mph70.3 mph+0.3 mph
80 mph80.3 mph+0.3 mph

Alternative sizes on the same 15-inch wheel

Sizes in use within ±3 % of the overall diameter of 165/80R15:

Plus and minus sizes for 165/80R15

SizeWheelDiameterDifference
205/70R14Minus 1 (14 in)25.30 in−0.37%
175/80R14Minus 1 (14 in)25.02 in−1.46%
185/75R14Minus 1 (14 in)24.93 in−1.84%
195/70R14Minus 1 (14 in)24.75 in−2.54%
215/55R16Plus 1 (16 in)25.31 in−0.33%
195/60R16Plus 1 (16 in)25.21 in−0.71%
205/60R16Plus 1 (16 in)25.69 in+1.15%
205/55R16Plus 1 (16 in)24.88 in−2.03%
195/55R17Plus 2 (17 in)25.44 in+0.20%
215/50R17Plus 2 (17 in)25.46 in+0.28%
205/50R17Plus 2 (17 in)25.07 in−1.27%
205/55R17Plus 2 (17 in)25.88 in+1.91%
205/45R18Plus 3 (18 in)25.26 in−0.51%
215/45R18Plus 3 (18 in)25.62 in+0.88%
215/40R18Plus 3 (18 in)24.77 in−2.45%

Nearby 15-inch sizes

Reading the 165/80R15 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.