I want to smooth out my ride...

Lol......!

Aint funny, steel belted radials do ride rougher that 4 ply nylon tires, think about it , steel belts slapping a sharp pot hole versus a cushiony nylon tire , Just dont hit too big a pot hole too hard w/ the 4 ply !
Same thing w/ the stupid rubber band tires on big tall rims , no cushion in the sidewalls , the more sidewall the better the ride..
Unless u like to corner carve .