275/40R17 tire size

A 275/40R17 tire is 25.66 inches (651.8 mm) tall, 10.83 in (275 mm) wide and fits a 17-inch wheel. In inch notation it is roughly a 25.7x10.8R17.

275/40R17 dimensions
Overall diameter25.66 in651.8 mm
Section width10.83 in275 mm
Sidewall height4.33 in110.0 mm
Circumference80.62 in2,048 mm
Revolutions785.9 per mile488.4 per km
Rim diameter17 in431.8 mm

Compare 275/40R17 with another size

Speed in

Overall diameter difference

+0.08%

60 mph on the speedometer = 60.0 mph actual

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

Ground clearance
+0.3 mm (+0.01 in)
Revolutions
786 → 785 per mile

275/40R17 245/45R17

Side-by-side dimensions

CurrentNewDifference%
Diameter25.66 in25.68 in+0.02 in+0.08%
Diameter651.8 mm652.3 mm+0.5 mm+0.08%
Width10.83 in9.65 in−1.18 in−10.91%
Width275.0 mm245.0 mm−30.0 mm−10.91%
Sidewall4.33 in4.34 in+0.01 in+0.23%
Sidewall110.0 mm110.3 mm+0.3 mm+0.23%
Circumference80.62 in80.68 in+0.06 in+0.08%
Revs per mile785.9 785.3 −0.6 −0.08%

Speedometer error

Speedometer showsActual speedDifference
20 mph20.0 mph0.0 mph
30 mph30.0 mph0.0 mph
40 mph40.0 mph0.0 mph
50 mph50.0 mph0.0 mph
60 mph60.0 mph0.0 mph
70 mph70.1 mph+0.1 mph
80 mph80.1 mph+0.1 mph

Alternative sizes on the same 17-inch wheel

Sizes in use within ±3 % of the overall diameter of 275/40R17:

Plus and minus sizes for 275/40R17

SizeWheelDiameterDifference
245/50R16Minus 1 (16 in)25.65 in−0.06%
245/40R18Plus 1 (18 in)25.72 in+0.21%
275/35R18Plus 1 (18 in)25.58 in−0.32%
285/35R18Plus 1 (18 in)25.85 in+0.75%
265/35R18Plus 1 (18 in)25.30 in−1.40%
285/30R19Plus 2 (19 in)25.73 in+0.28%
245/35R19Plus 2 (19 in)25.75 in+0.35%
275/30R19Plus 2 (19 in)25.50 in−0.64%
295/30R19Plus 2 (19 in)25.97 in+1.20%
245/30R20Plus 3 (20 in)25.79 in+0.49%
255/30R20Plus 3 (20 in)26.02 in+1.41%
265/30R20Plus 3 (20 in)26.26 in+2.33%

Nearby 17-inch sizes

Reading the 275/40R17 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.