A two-wheeled riding sulky for powered ground-maintenance machines includes, in addition to a primary hitch connection which operates in tension between the powered ground-maintenance machine and the sulky, a buck-bar which operates in compression between these two devices. The buck-bar is used to prevent the powered ground-maintenance machine from bucking. In a preferred embodiment, the powered ground-maintenance machine is a snow blower having only two ground-engaging, load-bearing traction wheels.