Well, on tuesday evening as I was having a little ride up at my school, my bike practically stopped in place. I could not roll the bike forward without pushing the pedals round at the same time. I took my back wheel off and the sprocket is not budging. I have no idea what to do as I think the whole driver inside the hub is fecked. Do I take it apart, have a look and possibly take the wheel to a shop? Or just buy a whole new driver straight away? Thankyou, James.