The conversion is far too costly. Take time remove from the wheel and go into business / market: zipper on, luggage hooks fold, below two zippers on, cram luggage hooks folded downwards in an extra compartment, be careful that this rain cover does not fall out. then both zips shut. The whole on the luggage rack off / balancing and possibly turn backpack upside down, since the tray for the luggage hook is indeed down. At full backpack still double difficult.