Our full 29”er… the Trauco.   Designed to provide all-day comfort & stability, the Trauco will carry you deep into the backcountry and get you home in time for dinner.

Want to have your cake & eat it too?  Try the Fifty-Five.  We set out to explore the possibilities in this emerging niche, but with our own twist.  What we found is a highly capable race machine.

We spliced our favorite bikes' genes: The great stability & feel of 29" wheels, and the quick accereration, handling & climbing prowess of a 26" race bike.

It's a simple formula:

26+29=Siren Fifty-Five

photo: Christophe Jobic