>>1319045You have to put it far back if you want to fit a 45c - 50c tire.
I have it far back because some say that increasing the chainstay length increase the comfort and since I do long touring rides I am looking at as much comfort as I can.. I havnt noticed anything between the two and it feels the same.
I even tried to take a turn at 60km/h just to see if the handling was worse, felt no difference.