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


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.

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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 versatile dropout is Gates Carbon Drive compatible.


This gold Trillium has a super-fun vibe.

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


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


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.