A roof-mounted bicycle rack assembly for a motor vehicle includes a deployable bicycle carrier slidably attached to an underside of a roof panel of the motor vehicle. The bicycle carrier includes at least one bicycle support configured to deploy from and retract into a cooperating holder disposed on the roof panel underside. The bicycle support may include at least one tube or rail and the cooperating holder may include at least one sleeve or track configured to receive at least a portion of the at least one tube or rail therein.