You can change the angle of your trucks and tailor your board to your wishes
"-" means that you decrease the angle of your truck by 5 or 10 degrees. "+" means that you increase the angle of your truck by 5 or 10 degrees. "R" are parallel risers without angles with 5 or 10 millimeter
Set of 2
You need longer screws, and due to the angle, the screws will be harder to screw in and will not be straight on the board surface.