The Tubus Duo is one of my favorite front low-rider racks! Through-the-fork mid-fork mounting eyelets are required (or matching inside and outside eyelets on each fork tube at mid-fork). Made from the same over-sized 14mm diameter tubing as the Tubus Tara with 10mm top-rails for mounting panniers, the Duo has the same carrying capacity as the Tara, and surprisingly, the Duo is just as stiff laterally, if not stiffer. The inner and out top-rails on each rack-half, support each other laterally, and make the rack very rigid. Yes, a hoop is often required to keep low-rider racks laterally rigid, but that is on racks with otherwise unsupported single top rails. So have no worries about going with the Tubus Duo if your rack has the correct fittings!