20" wheels without PASM

[jimbo761]

Does anyone here run on 20" wheels without PASM ? Am considering at some point switching my 18"s onto winters and buying a set of 20" wheels to fit the new n-rated Michelin PS4s. On 18"s with no PASM the ride is firm but not unbearable, on 20"s I do wonder how bone jarring the result will be, particularly on UK roads which will no doubt be a lot worse after the snow thaws.

[jimbo761]

718, but will happily take advice on similar.