What is this loop on my chainstay?
Image: http://i1134.photobucket.com/albums/m615/sloar1070/05FF93C5-3017-4D1B-914F-3610954C8A45_zpsfkmbiaoa.jpg (http://s1134.photobucket.com/user/sloar1070/media/05FF93C5-3017-4D1B-914F-3610954C8A45_zpsfkmbiaoa.jpg.html)