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.

NOTE:

The clearance to the brake is reduced.