MBB SUP Lower Bar Set
The MBB SUP Lower Bar Set is an add-on for the MBB Longboard Bike Rack. The SUP Bar set is a larger version of the cradles on the standard bicycle racks. Cradle interior width increases from 3.8″ to a full 6″ to handle thicker SUP boards including inflatable SUPs. May also be useful for carrying two lighter boards or other thicker objects. See the instruction sheet for a detailed comparison of dimensions.
Here are the printed instructions that come with each of the racks: SUP Lower Bars Instructions