New Drivetrain Option! The Super-Clean Gates Belt Drive.

A Clean, Quiet Alternative to the Bike Chain

When I first set out to design the platform for our Circa Trillium custom bicycles, one of the larger objectives was that our riders should be able to choose from the widest range of drivetrain options, including, the super-quiet, squeaky-clean Gates Belt Drive system.


Circa’s Custom Bike Design Process

Hand Built Bikes Designed by You

We Build Custom Dream Bikes, Starting at Under $2,000.


At Circa, you’ll always find the perfect bike. That’s because you’re not shopping for one that might work, but you’re designing the bike you’ve always wanted, one that fits perfectly, looks awesome and rides like a dream.


Sneak Peek. New Client Project. Circa Trillium Rose? Petal?

Here’s a sneak peek at a stunning new Trillium City I’m working on for my friend Erica, who loves pink (she’s even got some in her hair).


Circa Showroom Now Open in NW Portland!

Want to design the perfect Trillium for you? We just opened our NW Portland studio and showroom! Schedule a visit and come on by! The new showroom is at 1720 NW Lovejoy, Suite 111, Portland, OR  97209.

Goldie Deluxe City Bike

Pure Bicycle Joy, Hand-Made in Portland, Oregon.

$3,400.00 USD as shown.


Hand-built to be a perfect expression of modern bicycle design, this special-edition Circa Trillium (affectionately named Goldie) is perfect for town, pubs, picnics or beachside fun.


Circa Trillium Goldie Photo Shoot Time Lapse

Here’s a time-lapse video snippet from today’s photo shoot of our most recent build, the Circa Trillium affectionately known as “Goldie”.


It’s a Nice Campaign Video!

For those of you who didn’t see our crowdfunding campaign video, here it is!


Trillium Golden Bike Preview

When I was invited to the Oregon Handbuilt Bikes and Beer Fest, I wanted to create a something that really shows off the versatility of the Trillium platform. 


How Circa’s MABEL™ System Re-Thinks Bicycle Manufacturing

Circa is more than just one bike. It’s an entirely new way of making and delivering bikes to people. As we’ve said before, our goal is to create locally made bikes, just for you, in less than ten days and starting at less than $2,000.  


Custom City Bikes

Modern Urban Adventure

Starting at $1,800.00 USD

Circa’s custom city bike packages start with our super-versatile, Portland-made Trillium frame and is designed to be the perfect all-conditions commuter or urban bicycle.