Look at the first picture. There is a big bumpstop on the axle over the pin thing. Now look to the right a little bit. There is a smaller bumpstop attached to a bracket on the frame. It hits that one while articulating. If you look closely on the spring directly under it, there is no dirt, and there is a barely visible small circle. The small circle comes from the middle of the bumpstop. If you still don't see it, I can edit it and show you what I am talking about.
