The Six13's Optimo Aluminum head tube, seat tube and rear triangle are co-molded to high modulus carbon fiber top and down tubes, forming a mechanical interlock. The result is high frequency road vibration damping comfort up front, plus all the responsiveness you'd expect from a Cannondale in the back.
This year the readers of SKI magazine have voted Skirack a Gold Medal
Ski Shop - One of the Nation's 60 Best and the Only One in Burlington,
VT 
Thanks for helping Skirack become a Top 100 Bike Retailer
in the United States for 2005, 2006, 2007 and 2008!