The beam is secured via these two bolts, and is replaceable if you need a different size - just like how the Zipp 2001 worked. That flat top also looks good for attaching some kind of storage or hydration gear.
TJ Tollakson's Ruster brand has just finished its first complete bicycle frame, dubbed the Black Dimond. TriRig got an exclusive first look at the prototype bike. Although it looks almost exactly like the Zipp 2001 frame that inspired its design, this is a brand new frame, that came out of a brand new mold that TJ developed with EBS Carbon in Boulder, Colorado. We're proud to be the first in the world to show this bike to you. Enjoy!