I copied Blue~C's rack idea (view at Blue~C's photo album, photo file labeled "outards"). However, I have a high top and needed to get towers with extensions which worked just fine with the high top. I had to bend the metal gutter clamp a little bit so it opened enough to go around the grab rail (easy to do with slip joint pliers). I also had to bend the clamp tightening wrench (by Yakima) so it would clear the top when tightening the clamp (easy to do in a vice). I've been real happy with this rack. However, when considering bicycles I was going to use a 2x4 between the racks and mount a Yakima bike rack to it but decided to go with folding bikes lashed to the bow rail - see at Little Mac's photo album. I have yet to try the folding bikes but don't plan serious biking just beer, milk, and ice cream runs plus casual afternoon touring to stretch the legs and take in the scenery. Jay