US national champion Dave Zabriskie's bike is not easy to miss with its distinctive stars and stripes design. His DA was debuted at the Giro d'italia this year and has seen some improvements over the previous design. Felt has taken technology to the next level by using computational fluid dynamics (CFD) software and designing each part of the frame separately before joining the frame together with further CFD software, with the final step being wind tunnel testing.
The head tube has been narrowed with the help of a new 3/4in steerer tube and bearing, with the bayonet taking over the structural functions of the head tube. Small aerodynamic wings on the seat tube act to ‘trip' air flowing over the rear wheel and a small trip on the seatpost steers air away from the Di2 groupset's battery, positioned just below the saddle.
Designed so that as the yaw angle increases, the DA gets faster rather than slower, as many other designs do, according to the technical team at Felt. A new CNC'd rear brake runs in line with the chainstays and is similar to a V-brake design. Mavic's Cosmic Carbone 80 is fitted up front, a wheel we have seen all year but will now be available as a 2011 SSC product.
The DA's new rear brake is said to produce as much stopping power as a dual pivot with its V-brake design.
A small trip moulded at the rear of the seatpost smoothes air so that the battery doesn't adversely affect aerodynamics.
Mavic's Special Service Course full carbon rear disc wheel is only available to the pro teams. You'll just have to get a bit better!
Resourceful team mechanics have riveted a custom computer mount for his Garmin to Zabriskie's extensions, enabling him to see it easily in his tt position.
This article was first seen in Cycling Weekly magazine Thursday 8th July 2010
Thank you for reading 10 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1
Founded in 1891, Cycling Weekly and its team of expert journalists brings cyclists in-depth reviews, extensive coverage of both professional and domestic racing, as well as fitness advice and 'brew a cuppa and put your feet up' features. Cycling Weekly serves its audience across a range of platforms, from good old-fashioned print to online journalism, and video.
Techalogic DC-1 Helmet Camera (Front and Rear Facing) review - neat design but too heavy in use
A good value camera that is able to record front and rear at the same time but is a little heavy on a cycling helmet
By Paul Grele • Published
Ask a cycling coach: ‘If I’m shattered from work, am I better off reducing the power targets or skipping the session?’
How to work out if you should push through the fatigue or take some all-important recovery time
By James Spragg • Published