The HARO Sports Fitness floor has to be installed over a level sub-floor according to DIN18202: 1997-04, figure 3. The maximum tolerances are as follows:

Maximum tolerance of	In a radius of ...
3 mm (1/8")	1 m (3' 3")
9 mm (3/8")	4 m (13" 1")
12 mm (1/2")	10 m (39 4")
15 mm (5/8")	15 m(49' 2")