Disc wheels

H2 disc wheel (standard disc wheel) for emergency running system with integrated support ring 

1. Hump 2 of standard disc wheel
   Fig 1: H2 Disc Wheel For Emergency Running System With Integrated Support Ring

   Courtesy of BMW OF NORTH AMERICA, INC.

   EH2 disc wheel for emergency running system with self-supporting tire 

   1. Extended Hump 2 of disc wheel
   2. Drop center relocated a few millimeters to the center (pre-centering on outside)
   Fig 2: EH2 Disc Wheel For Emergency Running System With Self-Supporting Tyre

   Courtesy of BMW OF NORTH AMERICA, INC.
   NOTE: The new EH2 disc wheels (extended Hump 2 inner and outer) will be used more frequently on BMW vehicles in the future as they can also help to delay standard tires from being lost in the event of a drop in tire pressure.

   Example: from current 1.1 bar to 0.6 bar (X5 or Landrover disc wheel)