Hi, Recently My Norco started to make a "Knocking" noise, after finding it was the bearing in the frame, i took the bolt out to find the bearing was mashed, Ive got some new bearings, but im stuck how to get the old one out! I can't grip it because the centre has demolised itself and onlyn the outer ring is left (stuck in the frame) I cant hhit it with a screw driver because it sits flush with the frame, anyone got any ideas how to get it out! Thanks in advanced, Jake.