A track system for use with a vehicle having a chassis and a drive shaft extending laterally outwardly from the chassis for driving the track system , the track system comprising: • an attachment assembly connectable to the chassis of the vehicle , the attachment assembly having a leading pivot and a trailing pivot extending laterally outwardly therefrom; • a multi-member frame assembly disposed laterally outwardly from the attachment assembly , the multi-member frame assembly including: ∘ a leading frame member pivotably connected to the attachment assembly via the leading pivot for pivoting about a leading pivot axis ; ∘ a trailing frame member pivotably connected to the attachment assembly via the trailing pivot for pivoting about a trailing pivot axis ; ∘ a leading wheel-bearing frame member at least indirectly pivotably connected to the leading frame member ; ∘ a trailing wheel-bearing frame member at least indirectly pivotably connected to the trailing frame member ; • a damper interconnecting the leading frame member and the trailing frame member ; • a leading idler wheel assembly rotatably connected to the leading wheel-bearing frame member ; • a trailing idler wheel assembly rotatably connected to the trailing wheel-bearing frame member ; • a plurality of support wheel assemblies disposed intermediate the leading idler wheel assembly and the trailing idler wheel assembly ; • a gearbox having an input shaft operatively connectable to the drive shaft of the vehicle and an output shaft ; • a sprocket wheel operatively connected to the output shaft of the gearbox ; and • an endless track extending around the sprocket wheel , the leading idler wheel assembly , the trailing idler wheel assembly , and the plurality of support wheel assemblies , and drivable by the sprocket wheel . • an attachment assembly connectable to the chassis of the vehicle , the attachment assembly having a leading pivot and a trailing pivot extending laterally outwardly therefrom; • a multi-member frame assembly disposed laterally outwardly from the attachment assembly , the multi-member frame assembly including: ∘ a leading frame member pivotably connected to the attachment assembly via the leading pivot for pivoting about a leading pivot axis ; ∘ a trailing frame member pivotably connected to the attachment assembly via the trailing pivot for pivoting about a trailing pivot axis ; ∘ a leading wheel-bearing frame member at least indirectly pivotably connected to the leading frame member ; ∘ a trailing wheel-bearing frame member at least indirectly pivotably connected to the trailing frame member ; ∘ a leading frame member pivotably connected to the attachment assembly via the leading pivot for pivoting about a leading pivot axis ; ∘ a trailing frame member pivotably connected to the attachment assembly via the trailing pivot for pivoting about a trailing pivot axis ; ∘ a leading wheel-bearing frame member at least indirectly pivotably connected to the leading frame member ; ∘ a trailing wheel-bearing frame member at least indirectly pivotably connected to the trailing frame member ; • a damper interconnecting the leading frame member and the trailing frame member ; • a leading idler wheel assembly rotatably connected to the leading wheel-bearing frame member ; • a trailing idler wheel assembly rotatably connected to the trailing wheel-bearing frame member ; • a plurality of support wheel assemblies disposed intermediate the leading idler wheel assembly and the trailing idler wheel assembly ; • a gearbox having an input shaft operatively connectable to the drive shaft of the vehicle and an output shaft ; • a sprocket wheel operatively connected to the output shaft of the gearbox ; and • an endless track extending around the sprocket wheel , the leading idler wheel assembly , the trailing idler wheel assembly , and the plurality of support wheel assemblies , and drivable by the sprocket wheel . <EOS>