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Volkswagen Golf Mk7 Service & Repair Manual: Cross section of a radial belted tyre

This cross-section labels every layer of a Volkswagen Golf Mk7 radial belted tyre: tread block, groove, nylon ply, steel belt layers, and the bead core — steel wire vulcanised into rubber for secure rim seating.

Cross section of a radial belted tyre

1 -  Tread block
2 -  Tread groove
3 -  Tread
4 -  Nylon ply
5 -  Belt layers
Usually made of steel
6 -  Bead core
Consists of steel wires vulcanised into rubber.
Ensures secure seating of the tyre on the rim.
7 -  Bead filler
8 -  Rim flange protection
Protects the rim and tyre from abrasion from, for example, contact with the kerb
Tyres with Maximum Flange Shield (or rim protector bar) are marked with the abbreviation MFS.

 
The nylon ply -4-, belt layers -5-, bead cores -6- and bead filler -7- form the carcass. The carcass is the “load-bearing structure” of the tyre.

    Questions & answers

    Cross section of a radial belted tyre — Volkswagen Golf Mk7

    What does a radial tyre cross-section show?
    Tread, belt plies, carcass plies, sidewall rubber, bead wire, inner liner, shoulder and the relationship between aspect ratio and section width.
    Structure of a radial belted tyre
    ...

    Run-flat tyres, structure and identification of a SST tyre
    Removing and fitting run-flat tyres → Chapter. If run-flat tyres are used, a Tyre Pressure Monitor display must be fitted. ...