I took the 1” 1/4 to 2” adapter off my bike rack. When it was damaged by a car. And put a 1”1/4 stock steal drilled 2 holes and bolted it to the rack. Then took 2” stock and I slid over the 1” 1/4 stock steel And moved it back and forth until I liked it. I wielded it and now my rack hold 2 bikes and the swing out clear no issues and when I use it on my tundra it works perfect. The tail gate folds down and just enough room to get between.
I'm working on this rack for my 40. I wanted to keep good departure angle and be able to utilize the bumper swing out system I recently completed. Also, the cooler gets in the way of a tray style rack. So far it's way too bouncy. More R&D required.