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I am not sure about the Ram's rails, but I used to have a Nissan Titan and its rails were sized similar to superstruts rails. This allowed you to use superstrut cone nuts etc. For example, I used those to attach Yakima bike mounts directly to the rail. The possibilities are really endless that way. Home Depot sells the nuts and other superstruts stuff.
Nice! I used to be a long time Titan owner too (04-2019). If I could have found a very low mile, very inexpensive 2015 I probably would still be one - I really liked that truck - but I have no complaints about the Ram, it's a really nice riding truck