We currently offer five flexes spread out over two lengths.
42"/107cm Flex 1: 175-230+lbs / 80-105+kg
42"/107cm Flex 2: 150-210+lbs / 68-95+kg
38"/98cm Flex 3: 150-200+lbs / 68-90+kg
38"/98cm Flex 4: 120-170+lbs / 55-77+kg
38"/98cm Flex 5: 80-140+lbs / 35-65+kg
 
A softer flex pattern will give you more control and tighter turns at slower speeds, however a softer board is more prone to lose stability at higher speeds.
If you plan on doing a lot of hard pounding tricks: shovits, bonelesses, etc, a stiff flex will hold up better. Note: It is natural for the boards to break in and become slightly flexier over time.