I've been running the Dunlop WW for a long time now. For the 120/90-18 front tire I first cut off the middle portion of the fender bracket to get the needed extra space. Last winter I bought a new bracket that I extended an inch (used the bottom part of the old bracket). A little cutting and welding and now it's perfect. For me the handling with the Dunlops is perfect, and as a bonus the larger front made the speedo accurate.
Hope this helps!
