Recognising tyre wear and other tyre questions on a Speed D7
I recently got a Dahon Speed D7 and I have been taking it places. So far, I'm quite confused with my new tyres as it is my first bike with slicks, therefore, there's just no traditional way of recognising wear, coming from a knobby-tyre background, whereby once the knobs go, it's time for the tyre to go. Yet, when it comes to slicks, it seems to not be able to be judged under the same basis, since there are no knobs. I have a Dahon Speed D7 with its stock tyre, and therefore I was wondering how one determines whether it is time for a change.
Also, I have been hearing all sorts of good things about the Schwalbe tyres, and granted, I am a person who doesn't really care about marginal improvements for a lot of money, but I am tempted to get my hands on them if I can. I was wondering: based on your experiences, do different slicks perform distinctly differently?