A drill rig with a steering system may include a substructure having a wheelhouse, a drill floor arranged atop the substructure, a mast extending upwardly and above the drill floor, and a steering system arranged within the wheelhouse. The steering system may include a wheel assembly comprising an electric motor configured for driving rotational motion of a wheel, a deployment device configuring for deploying the wheel assembly to carry the drill rig, and a steering mechanism configured for selective engagement with the wheel assembly and rotating the wheel assembly.

A drill rig with a steering system may include a substructure having a wheelhouse, a drill floor arranged atop the substructure, a mast extending upwardly and above the drill floor, and a steering system arranged within the wheelhouse. The steering system may include a wheel assembly comprising an electric motor configured for driving rotational motion of a wheel, a deployment device configuring for deploying the wheel assembly to carry the drill rig, and a steering mechanism configured for selective engagement with the wheel assembly and rotating the wheel assembly.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A wheel with adjustable radius or tread firmness including a hub assembly, primary spokes, a suspension assembly positioned at the outer end of each primary spoke, and treads attached to the outer end of each suspension assembly. The hub assembly includes a radius lock and a tensioner lock. When each is in a locked position, the radius and tread firmness of the wheel remains constant. When the radius lock or the tensioner lock is in an unlocked position, the radius or the tread firmness, respectively, is adjusted by rotating the wheel relative to internal components of the hub assembly. This relative rotation adjusts the tension on internal cords to adjust the length of the primary spokes or flexibility of the suspension assemblies, respectively. Optionally, secondary spokes may be positioned between each of the primary spokes and the suspension assemblies. The radius and tread firmness is adjustable under a load.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A vehicle configuration wherein the center of mass of the vehicle is approximately superimposed upon the passenger and driver centers of mass when seated within the vehicle. An occupant's center of mass can be approximated using a standard center of mass position approximation, or a combination of any number of standard center of mass position approximations. The vehicle's center of mass can be approximately superimposed upon the occupant's center of mass in at least the longitudinal and vertical directions.

A vehicle with 3 or more wheels includes at least two wheels aligned on the same axis. The vehicle has an intermediate centerline plane between the wheels parallel to a direction of movement, including a mass suspended in relation to the wheels defining a passenger or containment compartment, and two suspension groups kinematically connecting the suspended mass to the two aligned wheels. An anti-roll stabilizer device has at least one compensation mass kinematically connected to the suspended mass via a guide and movable in relation thereto. The anti-roll stabilizer device has a drive of the compensation mass to distance or bring the compensation mass closer to the centerline plane on the side opposite the displacement of a barycenter of the suspended mass with respect to the same centerline plane, to oppose the displacement with respect to the centerline plane of the position of the barycenter of the suspended mass.