Principia Evolution SX Silver Shadow Frameset size s/m 53.....NEW IN BOX: Frame/carbon Isaac fork/headset ......Awesome frame from Denmark....smooth and silky ride......The Evolution SX frame is made from proprietary, custom drawn 7020 aluminum and features a sloping top tube (slope varies with size), Ellipse (egg-shaped) head tube, bottom bracket, and replaceable dropouts, and is constructed by tube-inserted-welding, in which the tube is not simply butted to the next tube and welded, but inserted and then welded. Comes with Isaac's 1-1/8in. all carbon fork weighing in at 350g. Standard (non-integrated) headset. Head tube shift cable guides. Clamp on front derailleur. For more information visit http://www.principiabikes.com retail about $2100.........$1250 shipped
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