Grooves:
Channels for water evacuation between tread and road surface.
Ribs:
Circumferential bands of tread rubber between grooves for continuous road contact and traction, may be enhanced with sipes.
Tread:
Contact area with road surface using various compound strategies like maximizing grip or mileage.
Shoulder:
Transition element between tread and sidewall for traction during cornering and maneuvering.
Belts:
Woven steel cord mesh for rigidity of tread rubber to reduce tread squirm and increase tread life.
Undertread:
Compounded for high heat resistance to increase high-speed durability and sometimes fuel economy.
Inner Liner:
Special rubber compound highly impervious to air migration for maintaining air pressure without leaking.
Body Plies:
Either fabric cord (passenger and light truck tires) or steel cord (mainly truck tires) for structural strength of air chamber.
Bead Cable:
Rigid cable serving as an anchor around which body plies are wrapped and which secures tire to rim flange area.
Bead Apex/Filler:
Special hard rubber compound extending up into sidewall to increase flexing around bead cable and enhance stiffness of lower sidewall for improved handling.
Bead Chafer:
Layer of fabric material protecting bead area from rim chafing and mounting damage.
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