< Revolutionarily Reinforced Radial Tire Construction >
|1. Apex strip:
A triangular piece of stiff rubber which is fitted onto the bead core to taper the rigid bead into the flexible body plies in the sidewall.
2. Aramid cord protector:
The tire is constructed with an aramid ply insert between the tread and the top belt to prevent damage to the tire belts.
3. Bead heel:
Outer edge of the bead.
4. Bead toe:
Inner edge of the bead.
5. Belt plies (Nylon cord):
Angled belt plies which serve to add strength to the tire especially in the tread area.
6. Belt plies (High modulus cord):
Belt plies which serve to add strength to the tire especially in the tread area.
7. Chafer strip:
Protective layer of rubber and fabric which prevents chafing between cord body plies and the wheel.
8. Carcass plies:
Layers of rubber-coated fabric plies which have the cords running radially from bead to bead. These provide the tire with strength in the sidewall area.
A sheet of low permeable rubber laminated to the inside of the first casing ply of a tubeless tire to insure retention of air when tire is inflated.
10. Ply turn-ups:
The turned-up ends of plies around the bead. Other plies lock the ends into place.
11. Rim line:
A line provided near the beads to allow inspection of how the tire fits with the rim.
The side area of the tire located between the shoulder and the beads. Composed of rubber, it protects the carcass from damage.
The functions of the radial tread are the same as those defined for the bias tire.
A rubber layer provided for use in retreading the tire and which provides adhesion of tread to the tire carcass. Bridgestone makes this rubber layer thick enough to ensure a high number of retreads.
15. Wire beads:
Two wire bundles (one for each bead) which help to maintain the shape of the tire and anchor it securely to the rim.
16. Venting hole:
The hole through which gas is vented from inside the carcass plies.
* Balance marker
A balance marker, consisting of a red dot, is affixed on the sidewall of the tire immediately above the bead to indicate the lightweight point of the tire.
> Basic Structure - Bias Tires