Hi,
The nipple was gripped, couldn't move it and eventually broke (half the head is missing), much like the nipples in this picture:
http://fcdn.mtbr.com/attachments/whe...y-img_3615.jpg
The suggested extraction method is to use a flat screw driver but the spoke is too ''engaged'' into the nipple and preventing me to use the flat screwdriver. Is there a special tool for this? Do I have to cut the spoke?