A track system for use with a towed vehicle having a chassis and an axle extending laterally outwardly from the chassis suitable for connection to the track system, the track system comprising: • an attachment assembly rotatably connectable to the axle of the vehicle; • a multi-member frame assembly disposed laterally outwardly from the attachment assembly, the multi-member frame assembly including: ∘ a primary frame member connected to the attachment assembly; ∘ at least one wheel-bearing frame member pivotably connected to the primary frame member about a pivot located within a recess ; the track system further comprising: • a leading idler wheel assembly rotatably connected to the at least one wheel-bearing frame member, the leading idler wheel assembly pivoting with respect to the primary frame member with the at least one wheel-bearing frame member; • a trailing idler wheel assembly rotatably connected to the at least one wheel-bearing frame member, the trailing idler wheel assembly pivoting with respect to the primary frame member with the at least one wheel-bearing frame member; and • an endless track extending around the primary frame member, the at least one wheel-bearing frame member, and the leading and trailing idler wheel assemblies, characterized in that the multi-member frame assembly further includes at least one resilient bushing assembly located within the recess and engaging the pivot, the at least one bushing assembly being resiliently deformable in a circumferential direction to permit pivoting of the pivot with respect to the recess, the at least one resilient bushing assembly being fixedly connected within the recess to resiliently bias the pivot towards a rest position with respect to the recess. • an attachment assembly rotatably connectable to the axle of the vehicle; • a multi-member frame assembly disposed laterally outwardly from the attachment assembly, the multi-member frame assembly including: ∘ a primary frame member connected to the attachment assembly; ∘ at least one wheel-bearing frame member pivotably connected to the primary frame member about a pivot located within a recess ; the track system further comprising: ∘ a primary frame member connected to the attachment assembly; ∘ at least one wheel-bearing frame member pivotably connected to the primary frame member about a pivot located within a recess ; the track system further comprising: • a leading idler wheel assembly rotatably connected to the at least one wheel-bearing frame member, the leading idler wheel assembly pivoting with respect to the primary frame member with the at least one wheel-bearing frame member; • a trailing idler wheel assembly rotatably connected to the at least one wheel-bearing frame member, the trailing idler wheel assembly pivoting with respect to the primary frame member with the at least one wheel-bearing frame member; and • an endless track extending around the primary frame member, the at least one wheel-bearing frame member, and the leading and trailing idler wheel assemblies, characterized in that the multi-member frame assembly further includes at least one resilient bushing assembly located within the recess and engaging the pivot, the at least one bushing assembly being resiliently deformable in a circumferential direction to permit pivoting of the pivot with respect to the recess, the at least one resilient bushing assembly being fixedly connected within the recess to resiliently bias the pivot towards a rest position with respect to the recess. <EOS>