No, not really.
ROOF KING's bracket is universal ... it allows for different height and pitch roofs. It accomplishes this with a telescoping "A" frame design allowing for different pitches and a sliding track that allows for different heights. Technically you can change the height but it would involve getting on the roof with tools to do so.
Some customers with younger children will start the system at its lowest height and then move it up once when their children graduate to a 10' rim height. If there is a gutter where you want to install you can get the rim as low as 6" above the top of the gutter. If you do not have a gutter you can get the rim as much as 1' 6" below the roofline.