245/45R17 tire size

A 245/45R17 tire is 245 mm wide with a sidewall 45% of its width (110.2 mm), fits a 17-inch rim and has an overall diameter of 652 mm (25.7 in).

DimensionMetricImperial
Section width245 mm9.65 in
Sidewall height110.2 mm4.34 in
Rim diameter431.8 mm17 in
Overall diameter652.3 mm25.68 in
Circumference2,049.3 mm80.68 in
Revolutions488 per km785 per mile

Reading the size 245/45R17

245Width in mm45Aspect ratio (sidewall % of width)RRadial construction17Rim diameter in inches

The load index and speed rating (for example 91V) follow the size on the sidewall. Replacement tires should match or exceed the original load index and speed rating.

Alternative sizes within 3% of 245/45R17

A replacement size should stay within about 3% of the original diameter so the speedometer, ABS and transmission stay accurate. Always check clearance, load index and the vehicle manufacturer's approved sizes.

SizeDiameterDifferenceSpeedo reads 100 → actual
205/60R16652 mm+0.0%100.0Compare
245/40R18653 mm+0.1%100.1Compare
215/45R18651 mm-0.2%99.8Compare
225/55R16654 mm+0.2%100.2Compare
245/35R19654 mm+0.3%100.3Compare
225/50R17657 mm+0.7%100.7Compare
205/65R15648 mm-0.7%99.3
205/55R17657 mm+0.8%100.8

Compare 245/45R17 with any size →

Other 17-inch sizes

205/40R17205/45R17205/50R17205/55R17215/40R17215/45R17215/50R17215/55R17215/60R17215/65R17225/45R17225/50R17225/55R17225/60R17225/65R17235/45R17235/55R17235/60R17235/65R17245/65R17245/70R17245/75R17255/65R17255/70R17265/65R17265/70R17285/70R17315/70R17