Document ID: chunk:federal_register_of_legislation:F2018C00788:front:0:p5
Version: federal_register_of_legislation:F2018C00788
Segment Type: other
Provision Reference: 
Character Range: 14878–17779

laid at alternate angles close to those of the carcass;

         2.3.3. "Radial" describes a pneumatic-tyre structure in which the ply cords extend to the beads and are laid substantially at 90° to the centre line of the tread, the carcass being stabilized by an essentially inextensible circumferential belt;

         2.3.4. "Reinforced" or "Extra Load" describes a pneumatic-tyre structure in which the carcass is more resistant than that of the corresponding standard tyre;

         2.3.5. "Temporary use spare tyre" means a tyre different from a tyre intended to be fitted to any vehicle for normal driving conditions but intended only for temporary use under restricted driving conditions;

         2.3.6.                    "T-type temporary use spare tyre" means a type of temporary use spare tyre designed for use at inflation pressures higher than those established for standard and reinforced tyres;

         2.3.7.                    "Run flat tyre" or "Self supporting tyre" describes a pneumatic tyre structure provided with any technical solutions (for example, reinforced sidewalls, etc.) allowing the pneumatic tyre, mounted on the appropriate wheel and in the absence of any supplementary component, to supply the vehicle with the basic tyre functions, at least, at a speed of 80km/h (50mph) and a distance of 80km when operating in flat tyre running mode.

         2.4. "Bead" means the part of a pneumatic tyre which is of such shape and structure as to               fit the rim and hold the tyre on it; [2]/

         2.5. "Cord" means the strands forming the fabric of the plies in the pneumatic tyre; 2/

         2.6. "Ply" means a layer of rubber-coated parallel cords; 2/

         2.7. "Carcass" means that part of a pneumatic tyre other than the tread and the rubber side walls which, when inflated, bears the load; 2/

         2.8. "Tread" means that part of a pneumatic tyre which comes into contact with the ground; 2/

         2.9. "Side wall" means the part of a pneumatic tyre between the tread and the bead; 2/

         2.10.  "Lower area of tyre" means the area included between the point of maximum section width of the tyre and the area designed to be covered by the edge of the rim; 2/
         2.10.1.  However, in case of tyres identified by the "tyre to rim fitment configuration" (see para. 3.1.10.) symbol "A", it means the area of the tyre which is seating on the rim.

         2.11.  "Tread groove" means the space between two adjacent ribs or blocks in the tread pattern; 2/

         2.12.  "Section width" means the linear distance between the outsides of the side walls of an inflated pneumatic tyre, excluding elevations due to labelling (marking), decoration or protective bands or ribs; 2/

         2.13.  "Overall width" means the linear distance between the outsides of the side walls of an inflated pneumatic tyre, including labelling