I am looking at a truck that already has the hitch rails in it the Question is are all hitches the same size how they mount in the slots on the rails. I have a 15k super glide we are going to look at the truck monday to try and buy it?
It probably has more to do with the positioning of the rails when they were installed on the truck than anything else. If they're too far off from the standard, maybe some hitches just won't quite fit. I think most, if not all, rail-mount hitches are designed to fit standard rail hole spacing (determined by the punch press manufacturing of the rails) and standard installation spacing width between the rails.