i want to get a slightly bigger set of tyre for my myvi after CNY. My stock tyre getting botak. Is there good recommended size for myvi? i wan a comfortable ride and also bcoz there are too many holes on the road nowadays.  my questions:

1) do i need to change the suspension if i change to bigger wheels?
2) the stock sport rim also need to change as well?
3) whats the good tyre size for myvi? bigger wan
4) more important, my car started to make noise liao. Wat should i do uh? i dont want those noise.

thanks to all forummers