disc brakes

I've had an ST1 for a couple of years. I commute on it, and now have around 10K miles on it. Still works fine, but I was interested in the ST2S because I wanted better brakes, better shifting, smart phone connectivity, and better distance. Now having bought an ST2S and ridden it for about a...

i got a new hub motor and i tried to install my existing rotors to it, but the space between the rotor and the hub is too small so my calliper rubs on the hub.. .i have 160mm rotors and avid juicy 7 callipers on a 2008 trek fuel ex 9