CONTERRA ARENA Quantum – Advancing Arena Maintenance Standards. Conterra`s Arena Quantum features innovative technology for arena maintenance: A Floating Flex-Hitch;  Three Levelling Bars, the first of which is located ahead of the tires to create a smooth ride; Two Rows of Commercial Grade Teeth to groom the arena; A Rear Footing Stabilization Bar, adjusted with a Side-Wind Jack, to create ground compaction as required; Finishing with a two-piece Rear Roller, enhancing the top dressing on your arena. Depth Control, on the Conterra Arena Quantum, is a Hydraulic System and has a range of 0” to 7.5” deep. Once grooming depth is established, the distance between the tire and teeth never changes. Simply lower the groomer until the tires hit the ground and drive.