I just got a new bike. My friend found it in front of a bikeshop with a "free!" sign on it. It has a bad problem in the back wheel, which I have diagnosed to be a bent axle and destroyed bearing.
That's the bike. Pretty nice, all aluminum. Not too sure about all the suspension gizmos, but free is free. I trained as an auto mechanic for two years, so I've got tehnical ability and I've been messing around with bikes since I was little, so I _kind of_ know my way around one. This problem has me stumped though. How do I removed the piece pictured below?