A three-wheeled vehicle having a front wheel assembly attached to a chassis. The chassis includes a rotational control shaft having a rotational axis that is generally directed in a longitudinal direction of the vehicle. The rotational control shaft is integrated with or secured to the chassis in a non-rotational manner and passes through the front wheel assembly in a rotationally-free manner, such that the rotational control shaft can rotate about its rotational axis. The front wheel assembly includes one or more lean control motors, which are operably configured to rotate the rotational control shaft about its rotational axis thereby causing the chassis to lean from side to side to improve the handling ability of the vehicle. Some embodiments include a lean control system configured to automatically control the degree of rotation of the chassis.

A vehicle may include a frame structure, four wheels, and four independent suspension systems coupled to the frame structure and configured to support the wheels relative to the frame structure. Each suspension system may include a suspension arm movably coupling a respective wheel to the frame structure, a torsion bar coupled to the suspension arm and imparting a spring force on the suspension arm, a preload arm coupled to the torsion bar, and a preload adjustment motor coupled to the preload arm and configured to rotate the torsion bar to adjust a preload on the torsion bar.

A vehicle ride height adjustment system includes a vehicle chassis. A wheel is connected to the vehicle chassis by a suspension system. A shock absorber and spring assembly are connected to the vehicle chassis and the shock absorber and spring assembly are connected to the suspension system by a height adjustment mechanism.

A three-wheeled vehicle having a front wheel assembly attached to a chassis. The chassis includes a rotational control shaft having a rotational axis that is generally directed in a longitudinal direction of the vehicle. The rotational control shaft is integrated with or secured to the chassis in a non-rotational manner and passes through the front wheel assembly in a rotationally-free manner, such that the rotational control shaft can rotate about its rotational axis. The front wheel assembly includes one or more lean control motors, which are operably configured to rotate the rotational control shaft about its rotational axis thereby causing the chassis to lean from side to side to improve the handling ability of the vehicle. Some embodiments include a lean control system configured to automatically control the degree of rotation of the chassis.

A vehicle may include a frame structure, four wheels, and four independent suspension systems coupled to the frame structure and configured to support the wheels relative to the frame structure. Each suspension system may include a suspension arm movably coupling a respective wheel to the frame structure, a torsion bar coupled to the suspension arm and imparting a spring force on the suspension arm, a preload arm coupled to the torsion bar, and a preload adjustment motor coupled to the preload arm and configured to rotate the torsion bar to adjust a preload on the torsion bar.

A three-wheeled vehicle having a front wheel assembly attached to a chassis. The chassis includes a rotational control shaft having a rotational axis that is generally directed in a longitudinal direction of the vehicle. The rotational control shaft is integrated with or secured to the chassis in a non-rotational manner and passes through the front wheel assembly in a rotationally-free manner, such that the rotational control shaft can rotate about its rotational axis. The front wheel assembly includes one or more lean control motors, which are operably configured to rotate the rotational control shaft about its rotational axis thereby causing the chassis to lean from side to side to improve the handling ability of the vehicle. Some embodiments include a lean control system configured to automatically control the degree of rotation of the chassis.