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@ObiWomKenobi
XLR8R are carbon too....
http://www.columbustubi.com/eng/4_1.htm
for other tubes see:
http://1.bp.blogspot.com/-w1kJ_pUcw6o/TkvAjxbH1CI/AAAAAAAAAOo/U9OPDu3NbwU/s1600/tuberias+columbus.jpg
http://www.equusbicycle.com/bike/columbus/Columbus-tubes.jpg