FLIP TO FIT! Versatility and simplicity is the virtue of this design. The rack deck can adjust fore and aft, but also flip over to better fit different size bikes. . . . Aluminum Construction: A lightweight and tough material for extra durability.. . No frame mounts required. . Perfoms great with trunk bags. . Light and reflector mounting loop. . Fits seatposts 22-32mm in diameter. . 22 lb/10 kg Carrying capacity. . Imported. . . .