No need to drill in to the tower.

Mounting Width  A  Width At Top  B (REAR)   Width At Top  C (FRONT)  74" - 82" 60" 54" 82" - 90" 68" 60" 90" - 98" 75" 67" Use this table to ensure your tower has enough clearance for the 26" Tower Bimini.

Tower Bimini Measurement & Selection

Tower biminis mount directly onto the frame of your ski/wakeboard tower.

Pick the best position on the tower that will provide the best shade for the driver's seat.

Measuring Width for 26" Tower Biminis

First, measure the width of your tower at the desired mounting point.   (Line A on the diagram)

Then, measure 26" up from the mounting point.

Next, measure the width of your tower 26" above the mounting point between the rear tower legs.   (Line B on the diagram)

Finally, measure the width of your tower 26" above the mounting point between the front tower legs.   (Line C on the diagram)

Width at point A should fall between the measurements listed below.

Width at point B should be greater than the measurements listed below.