The 550 is a Mini-Maxi Sports-Cruising Cat with the racing pedigree of  Grainger Designs' and with class to burn for  exhilarating sailing.

The concentration of volume amidships and the lack of overly exaggerated  long ends provides loads of usable room along with a stable ride. There is room enough for most combinations of families or groups of friends. There is also room for a live-aboard professional working couple, with space for hanging good work-clothes, a decent sized office, a laundry, a workshop, and the cruising gear.