Run-Flat Tire, SST Tires, Structure And Labelling: Assembly

Fig 1: Identifying Tire Structure

Courtesy of AUDI OF AMERICA, LLC

1 -  Bead with Bead Core

2 -  Sidewall

3 -  Sidewall Reinforcement

4 -  Rim with extended hump (EH2) on both sides - required when using run-flat tires

Technology in detail

Standard tires without emergency running characteristics

-- -I  - standard tires with air.

Fig 2: Identifying Standard Tires With Air & Standard Tires Without Air

Courtesy of AUDI OF AMERICA, LLC

-- -II  - standard tires without air.

-- If the standard tire loses air, the rim presses the side wall together. The rubber in a flat tire is heated strongly and quickly loses its properties.

SST tires with reinforced side wall

The self-supporting, reinforced side walls from the basis of SST technology.

-- -I  - SST tires with air.

Fig 3: Identifying SST Tires With Air And SST Tires Without Air

Courtesy of AUDI OF AMERICA, LLC

-- -II  - SST tires without air.

-- Especially thick side walls -A- support the empty tires on a standard rim and the vehicle remains maneuverable. A special rubber mixture reinforces the tires and supports the vehicle in an emergency.

The reinforced side walls, unlike a standard tire, prevent the tire flanks from pinching between the road and rim when flat.

Difference in version H2 and EJ2 Extended Hump Rim

• The increased hump on the EH2 Extended Hump Rim prevents the SST tire from springing off when pressure is lost.
• EH2 Extended Hump Rim builds up toward the center of the wheel.