right so i found a beach cruiser in the dumpster and i removed the rear wheel to replace it but i dont know what kind of mechanism this thing has. the bike brakes when i turn the pedals back. the side arm bolts onto a bracket on the frame. i looked at free wheels and cassets but idk what this is.
http://i373.photobucket.com/albums/oo178/cuagamailero/1102101810.jpg
http://i373.photobucket.com/albums/oo178/cuagamailero/1102101810a.jpg
http://i373.photobucket.com/albums/oo178/cuagamailero/1102101810.jpg
http://i373.photobucket.com/albums/oo178/cuagamailero/1102101810a.jpg