Trisports.com reviews the Airfoil Pro SL Triathlon Bike at Interbike
2009 Kestrel Airfoil Pro SL Special Edition Triathlon Bike:
The Kestrel Airfoil is designed with one thing in mind: aerodynamics. Its innovative and unique design offers two major advantages over the competition. Firstly, by creating a radical, â€œopenâ€ triangle, wind drag created by the rider’s movements was drastically reduced. So what’s that mean? It means the Airfoil is at its best when being ridden and not just good in a wind tunnel. Secondly, the open triangle offers one of the most comfortable and compliant triathlon bikes. A dream to ride on.
With all the advantages of the open triangle Kestrel was still not sastified. They wanted to improve on the design. They channeled the headtube to improve aerodynamics, in addition to increasing the crown to stiffen the front end. Then they redesigned the downtube and bottom bracket junction and improved the stiffness. This also improved the ride quality even more! The rear triangle uses 700K unidirectional carbon fiber which keeps the road vibrations to a minimum and improves aerodynamics as well. The final result? A lighter, faster bike that is also 20% stiffer than its predecessor.