An airbag apparatus for a front passenger’s seat includes a case that includes a front storage area that has an airbag mounting plane and a rear storage area. A message is generated that associates with provision of control of a data bearer between the nodes, said message being based on a data bearer control protocol. Each roller is asymmetric, having a curved raceway-contacting surface contacting at least one of the curved innerouter raceways of the first innerouter ring, respectively.