2013 Scion tC Tire Size

The original tire size for your 2013 Scion tC is listed below. Tap on the box to view a color-coded explanation of the best Scion tC tire size.

P225/45R18 91W

Simplified Size:  225-45-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2013 Scion tC is P225/45R18 91W.  A color-coded explanation of the 2013 Scion tC's tire size is shown below.


This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle

This number indicates that your tire has a width of 225 millimeters.


This number means that your tire has an aspect ratio of 45%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width.  In this case, the sidewall height works out to be 101 millimeters.


This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

BBias Belt

The tire size was designed to fit rims or wheels that are 18 inches in diameter.


This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.


This tire has a speed rating of W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.