Blew out my pivot cups on my thunders, using the riptide replacement and they seem really nice. Don’t notice too big of a difference but no more squeak, and they feel slightly more stable I think.
I also threw in some Thunder 94a bushings, and for some reason on my back truck the kingpin nut keeps coming loose. I don’t have the trucks that loose, The nut sits flush with no threads visable. I need to compare but it honestly makes me think maybe the Thunder brand 94a’s are actually slightly taller than the stock 90’s? Not sure.