Kuryakyn 7156 Premier Luggage Rack All-new three-dimensional, streamlined design Black rubber inserts contrast the bright chrome finish and provide a non-slip surface Compatible with all Kuryakyn Side Straps and Sissy Bars (except Transformer Sissy Bar) Also installs on the mounting bolt side strap of other sissy bars with the following dimensions: sissy bar mounting bolts must be 1/4in.-20 with 1 3/16in. to 1 5/16in. center-tocenter spacing, mounting inside existing side straps with width from 5 5/8in. to 6in. or 7 1/4in. to 7 1/2in. wide, and mounting outside straps with width from 5 3/8in. to 5 5/8in. or 7in. to 7 1/4in. wide Uses 1/4in.-20 mounting bolts (not included) for installation