The integrated bar allows you to use any extension, and control its tilt, reach, and roll independently of the base bar. However, if you'd rather use your favorite aerobar, you can swap out the Shiv bar system, since it uses a standard fork - just bolt on your own stem and bars, and you're good to go.
Specialized has just released its all-new Shiv platform for triathletes. The bike is an all-out effort for triathletes that completely ignores the UCI rules and represents not only the fastest bike that Specialized could think up, but the most usable one as well. It's built for speed, but also made to be super easy to build, take apart, travel with, and adjust. Read on for my full report and impressions of this gnarly machine.