A riding lawn mower (100) comprising: a cutting deck (184) housing a cutting blade an engine (130) a deck drive (170) coupled to the engine (130) to receive power for operating the cutting blade a ground drive (160) coupled to the engine (130) to receive power for movement of the riding lawn mower (100) over ground and a frame (210) coupled to the cutting deck (184) and providing structural support for the riding lawn mower (100), the frame (210) comprising at least a first tubular structure and a second tubular structure, the first and second tubular structures extending substantially parallel to each and to a longitudinal centerline of the riding lawn mower (100), wherein the first and second tubular structures each include one or more curved portions (210A) to provide flexion of the frame (210).
