Product News

【MY DOPPO RACER】A product of my imagination.

It’s been a while, so I’d like to share what I’ve been up to lately.

How are you all spending your time staying at home?
It’s a beautiful season that makes you want to get out and ride, but given the current situation where we still can’t let our guard down, I’ve been telling myself to treat this as a good opportunity to tend to my own bike.

As for me, I decided to take this time—which is more than enough for letting one’s imagination run wild—to turn a long-standing idea into reality.

I took the plunge and rebuilt my Doppo Racer, which I had originally set up as a CX racer. But when I say "rebuild," I mean a significant change in specifications. Those who noticed it in the photo have a sharp eye.

The concept of the Doppo Racer is that it’s a tool you can build according to how you want to play—whether as a pure race bike, for exploring gravel, or as a dirt tourer. So, this is how I’ve expressed my own style of fun through this bike.

Actually, the dropouts used on the Doppo Racer have a track-end type replacement part available. I had been dreaming about whether it would fit properly, so I decided to take the risk and try it out at this time. It installed without any issues, so I turned it into a single-speed gravel bike. And it's fixed gear, too.

I used a niche hub that only manufacturers like SURLY or PAUL make—a 135mm spacing disc brake-compatible track hub—and converted the wheels to 650B. Since I’m a greedy rider who really wants to enjoy the dirt, I chose WTB / Sendero tires. A key detail is that I purposefully used SIMWORKS BY NISSEN French-style cable for the brakes. By the way, we have the aforementioned niche hubs in stock at Circles (click here for details). If there are any fellow enthusiasts out there who think they’re up to the challenge, please feel free to consult us (lol).

Frame & Fork SimWorks Doppo Racer Limited Edition Frame Set
Handle SimWorks By Nitto Misirlou 470mm
Tire WTB Sendero 650B x 47mm
Rim WTB Ci24 TCS Carbon Rim
Hub PAUL COMPONENT Front : Disk Word / Rear : Fixed Disk Word Hub
Brake Cable SimWorks By Nissen Heritage Outer Cable French / Red

Tracklocross is gaining momentum, but I’ve personally been interested in the idea of riding fixed gear on gravel, and this is the form I imagined. I’ll call it #Gfixed. I’m not sure yet if the current gear ratio is the "correct" one, but once things settle down, I can’t wait to ride this and tear through the gravel!


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We have been operating by appointment for about a month since the declaration of the state of emergency. To prioritize safety and provide the best possible service to our customers, we intend to continue with our current appointment-only system as we seek to contribute to society as a bike shop.

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Of course, there may be situations where we need to make further changes depending on how things unfold, but for now, we will continue operating in the manner described above while remaining vigilant against the virus. We appreciate your continued cooperation.

Items mentioned in this article