A radio-controlled vehicle having a frame, a left undercarriage and a right undercarriage; wherein the frame has a front guide and a rear guide, each configured to house a respective cylinder; each undercarriage having a front slide and a rear slide, which are connected in a sliding manner to the front guide and to the rear guide, respectively; wherein each cylinder is configured to selectively vary the distance between the longitudinal axis of the frame and the longitudinal axis of each undercarriage; wherein each undercarriage comprises an anti-derailment plate.

A radio-controlled vehicle having a frame, a left undercarriage and a right undercarriage; wherein the frame has a front guide and a rear guide, each configured to house a respective cylinder; each undercarriage having a front slide and a rear slide, which are connected in a sliding manner to the front guide and to the rear guide, respectively; wherein each cylinder is configured to selectively vary the distance between the longitudinal axis of the frame and the longitudinal axis of each undercarriage; wherein each undercarriage comprises an anti-derailment plate.

A farm implement is provided having a frame and first and second track assemblies. The first track assembly has a first track frame, a first idler wheel, and a first brake assembly. The first idler wheel has an inboard side facing toward and an outboard side facing away from a center the first track frame. The first brake assembly has a first disc coupled to the first idler wheel on the outboard side of the first idler wheel, a first caliper couplable to first and second sides of the first disc, and a first torque arm coupled to the first track frame and a spindle of the first idler wheel. The first caliper is mounted on the first torque arm, and is configured to clamp down on the first and second sides of the first disc in order to slow and/or stop rotation of the first idler wheel.

A farm implement is provided having a frame and first and second track assemblies. The first track assembly has a first track frame, a first idler wheel, and a first brake assembly. The first idler wheel has an inboard side facing toward and an outboard side facing away from a center the first track frame. The first brake assembly has a first disc coupled to the first idler wheel on the outboard side of the first idler wheel, a first caliper couplable to first and second sides of the first disc, and a first torque arm coupled to the first track frame and a spindle of the first idler wheel. The first caliper is mounted on the first torque arm, and is configured to clamp down on the first and second sides of the first disc in order to slow and/or stop rotation of the first idler wheel.

A replacement kit includes a first coupler that includes a first inner axial end, a first outer axial end, and a first coupler attachment portion including a first forked oblong structure that defines a first minor axis with a first minor axis length, and a first major axis with a first major axis length that is greater than the first minor axis length, and including a first prong, a second prong disposed axially away from the first prong, and defining a first predetermined axial distance, and a first cam surface disposed between the first prong and the second prong.

A replacement kit includes a first coupler that includes a first inner axial end, a first outer axial end, and a first coupler attachment portion including a first forked oblong structure that defines a first minor axis with a first minor axis length, and a first major axis with a first major axis length that is greater than the first minor axis length, and including a first prong, a second prong disposed axially away from the first prong, and defining a first predetermined axial distance, and a first cam surface disposed between the first prong and the second prong.

A carriage assembly includes a primary frame, a first idler wheel mounted to the primary frame, and a secondary frame pivotably mounted to the primary frame. The carriage assembly further includes an idler wheel assembly coupled to the secondary frame and movable with respect to the secondary frame along a longitudinal axis of the idler wheel assembly. The idler wheel assembly includes at least one second idler wheel and at least one third idler wheel mounted to the idler wheel assembly such that the second idler wheel is located between the first idler wheel and the third idler wheel. The first idler wheel is configured to pivot with the primary frame relative to the secondary frame, and the second idler wheel and the third idler wheel are configured to move with the idler wheel assembly relative to the secondary frame along the longitudinal axis of the idler wheel assembly.

A carriage assembly includes a primary frame, a first idler wheel mounted to the primary frame, and a secondary frame pivotably mounted to the primary frame. The carriage assembly further includes an idler wheel assembly coupled to the secondary frame and movable with respect to the secondary frame along a longitudinal axis of the idler wheel assembly. The idler wheel assembly includes at least one second idler wheel and at least one third idler wheel mounted to the idler wheel assembly such that the second idler wheel is located between the first idler wheel and the third idler wheel. The first idler wheel is configured to pivot with the primary frame relative to the secondary frame, and the second idler wheel and the third idler wheel are configured to move with the idler wheel assembly relative to the secondary frame along the longitudinal axis of the idler wheel assembly.

A support structure for a track system is disclosed. The support structure has leading and trailing linkages which are pivotally connectable to a frame member of the track system through, respectively, leading and trailing pivots. The leading linkage is pivotally connected to the trailing linkage through an intermediate pivot. The support structure has at least one biasing assembly. Leading, intermediate and trailing support wheel assemblies are connected to the support structure, which is adapted to move such that when the leading support wheel assembly moves in a first direction, the intermediate support wheel assembly moves in a second direction, and the trailing support wheel assembly moves in the first direction. A track system having the support structure and a vehicle having the track system is also disclosed.

A track chain assembly includes at least one track link having a shelf extending laterally from the a side surface and including a support surface spaced away from the top surface a predetermined distance measured perpendicularly to the top surface.