To fit using the supplied hook straps remove bike seat and locate the best mounting areas on the rear subframe. It may be necessary to slot the internal plastic tray if no subframe metalwork is exposed. Attach the 4x 20mm web loops securely to high strength areas of the frame. The 20mm loops are adjustable in length. Refit the seat with the web loops poking out from underneath and complete any necessary final adjustments of the straps. Ensure the web is threaded back through the adjuster to lock-off the webbing (i.e. threaded through the plastic buckle three times). To fit the US-pack, hook the alloy hooks through the now installed web loops, place the pack on the seat and connect the top quick-release buckles and tension them and the bag on to the bike. Always use the 2 x strap keepers on the web to manage the loose ends. Please also ensure that the quick-release buckles are correctly 'clicked' home. With the Hook strap mounting system, the optional connector straps are not required.
NB - Some bikes already have web loops attached to the seat-pad/base. In this case we still recommend the fitting of the Kriega loops, as fitting to the subframe is far stronger than to the seat.