Each Circa frame is hand-built to your specifications in Portland, Oregon.

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The horizontal Circa dropouts are built for versatility, so you can build with almost any drivetrain including derailleurs, single-speeds, internally geared hubs, and even Gates Belt Drives.


Circa's precision CNC’d bottom bracket shows an unyielding attention to matching process, beauty and function.


Our aluminum tubing and billet, CNC'd lugs, finishes and final assembly are all produced in the U.S.A.


Circa's versatile dropout is Gates Carbon Drive compatible.


This gold Trillium has a super-fun vibe.


Circa's anodized finishes are lighter and tougher than paint, and impervious to the harshest weather.


Color is a great way to give your bike personality. In a Circa design session, you can pick from a fun palette of durable anodized finishes and get creative with how colors are applied to different parts of the frame to create a bike that's distinctly yours.


Please refer to this guide for sizing assistance. If you're in-between sizes, or you don't fit the current size range, please contact us and we'll see what we can do.


Click "Get Started!" to talk to us about building your CIRCA.