If your tire size begins with a "P", it means it is a Passenger car tire in P-metric sizes. Those without the "P" are "European" metric sizes, which may have different load ratings or speed ratings.

The width of your tire, from sidewall to sidewall, in millimetres. This determines the width of the rim that your tires are mounted on.

The aspect ratio of the tire, or the height of the sidewall, as a percentage of the width. The lower the number, the stiffer the sidewall.

This indicates that the tire is a Radial tire, constructed for strength and reinforcement as well as fuel efficiency.

This is the diameter of the tire, which determines the size of the steel or alloy wheel that the tire must be mounted on.

After the size is the load index. This indicates how much weight the tire can support at maximum air pressure. Higher numbers are for heavier vehicles.

The Speed Rating indicator is matched to the maximum speed of the vehicle. Examples include: S-180km/h, T-190km/h, H-210km/h, V-240km/h