http://www.google.com.tr/imgres?q=bisiklet+amortis%C3%B6r%C3%BCndeki+delikler&um=1&hl=tr&sa=N&biw=1366&bih=601&tbm=isch&tbnid=aLiMRr2vKQ5xXM:&imgrefurl=http://www.bisikletyolu.com/index.php%3Ftopic%3D404.0&docid=RF09yjGRm9HS1M&w=600&h=450&ei=qN91Tu3kMazU4QSms_2nDQ&zoom=1&iact=hc&vpx=167&vpy=293&d...