235/45R17 tire size

A 235/45R17 tire is 235 mm wide with a sidewall 45% of its width (105.8 mm), fits a 17-inch rim and has an overall diameter of 643 mm (25.3 in).

DimensionMetricImperial
Section width235 mm9.25 in
Sidewall height105.8 mm4.16 in
Rim diameter431.8 mm17 in
Overall diameter643.3 mm25.33 in
Circumference2,021.0 mm79.57 in
Revolutions495 per km796 per mile

Reading the size 235/45R17

235Width 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 235/45R17

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
215/55R16643 mm-0.1%99.9Compare
265/35R18643 mm-0.1%99.9Compare
235/40R18645 mm+0.3%100.3Compare
225/35R19640 mm-0.5%99.5Compare
215/50R17647 mm+0.5%100.5Compare
235/35R19647 mm+0.6%100.6Compare
205/65R15648 mm+0.7%100.7Compare
225/40R18637 mm-0.9%99.1

Compare 235/45R17 with any size →

Other 17-inch sizes

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