Currently we offer the option to add universal inserts to all our racks, Our universal insert packs allow all of our other racks to fit the included sizes: 1-5/8", 1-7/8", 2", 2-1/4", 2-3/8", 2-1/2". These are plastic shims that will allow our racks to work with a circular pipe design. When ordering a rack and adding the option to allow the rack to swivel with the addition of the swivel adapter we must know the tubing size of your tower. When you order the swivel adapter to add to an existing rack or any rack with a swivel adapter, we send a metal shim that is required due to the motion of the swivel. Therefore, we will need to know the size tubing of your tower to determine which size shim is needed.
All Monster Towers currently being produced use 2.5" tubing. We do not know the specification of any other wakeboard towers in the industry and recommend measuring your current tower if it is not a Monster Tower.
Thank you,