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Home >> Audi >> 2020 >> SQ8 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Wheels, Tires, Wheel Alignment (Wheel Changing - Temporary Spares)) >> 44 Wheels, Tires, Wheel Alignment >> Tire Information >> Radial Tire Structure

Radial Tire Structure

WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

The cross section of a ply tire is shown in the image.

Fig 1: Cross-Section Of A Radial Tire
GWWA44-10016Courtesy of AUDI
  1. Tread Lug
  2. Tread Groove
  3. Tread
  4. Nylon Ply
  5. Ply Layers, Consists Mostly of Steel
  6. Bead Core, Consists of Steel Wires Vulcanized into Rubber Make Sure Tire is Securely Fitted on the Rim.
  7. Bead Reinforcement
  8. Rim Flange Protection, Protects the Rim and Tire from Abrasion Due to, for Example, Contact with the Curb. Tires with Rim Protection Are Identified by the Abbreviation MFS.

The nylon ply -4-, belt layers -5-, bead cores -6- and bead reinforcements -7- make up the shell. The shell is the >>load-bearing structure<< of the tire.