Moved By Bikes SUP Lower Bar SetOur SUP Bar sets are larger versions of the cradles on our standard bicycle and surfboard moped 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. THIS IS NOT A COMPLETE RACK. This is just a larger set of lower cradles that can be added to any