Tyre Basics
Sidewall
Protects the tyre against impacts with curbs, etc. This is also where the sidewall markings can be found which tell you important information regarding the tyre.

Tread
Provides traction in a variety of conditions, resists wear, abrasion, and heat..

Crown Plies
Provide the rigid base for the tread, which allows for good gas mileage. The plies also provide centrifugal and lateral rigidly to the tyre, while being designed to flex sufficiently for a comfortable ride.

Airtight Rubber
Formulated virtually impermeable butyl rubber, this material replaces the inner tube in modern, tubeless tyres. Check your air pressure monthly, as some air loss occurs over time.

Carcass Ply
Made up of thin textile fibre cables bonded into the rubber. These cables are largely responsible for determining the strength of the tyre.

Bead
Clamps the tyre firmly against the wheel rim.