I had a locking hitch pin on my Saris Cycle-On... couldn't remember where I put the key when winter rolled around, but it turns out the other bolt (where it pivots to flip up in non-bike-carrying-mode) is just another regular bolt that someone can undo in about 30 secconds. Good to know that someone can steal my $500 rack and $5000 bike in about 30 secconds WITH a locked hitch pin doing basically nothing.... Not that I would rely on that, but you think they would really design this stuff better.