It’s not considered safe to use tie downs with hooks on a roof rack. If the strap loosens, the entire strap can come off. The best way to tie down roof loads is to use an endless tie down (ratchet or cam) and wrap the strap around the bar, over the load and around the bar on the other side. This is the proper way to tie down boats, skis, lumber, etc. The strap can’t come off and you get the entire strength of the bar, not just a bolted point. This is why we don’t sell or encourage using bolted tie down points on the roof.
As for end stops, these are totally unnecessary and somewhat of a nuisance as they hang up on stuff that you might want to slide up onto the bars (handy on tall trucks). That’s why we designed the ends of the beef bars to be relatively smooth. If your load is properly tied down it won’t be able to slide off the end.
