How stiff should a longboard be to slide on?

The stiffness of a longboard for sliding typically depends on the rider's weight and skill level, but generally, a medium to stiff flex is preferred. A stiffer board provides better stability and control during slides, making it easier to initiate and hold them. Riders may choose a stiffer board if they are heavier or more experienced, while lighter or beginner riders might opt for a slightly softer flex for better feel and feedback. Ultimately, personal preference plays a significant role in selecting the right stiffness.