Introducing the Thesis OB1: a premium carbon gravel bike for any road, from perfect asphalt to gravel paths to rocky trails.
The OB1 is fast, versatile, brilliantly equipped, and built to last. Mix that with our factory-direct pricing, and you’ll understand why it’s been called “unbeatable”.
There are lots of roads out there, some rougher than others. But there’s no reason to leave them unexplored. The OB1 is your one bike for every road.
How it works
We put care into the smooth lines of the carbon frame, the rock solid thru-axle dropouts, the array of bottle & fender mounts, smart drivetrain and bearing choices, and a smarter approach to carbon wheels.
We sweat all these details because we know they’re the details that matter, now and years from now.
We created Thesis as an act of rebellion.
Thesis is a direct-to-consumer bicycle company based in California. Our name comes from a belief that thoughtful curation, evidence-based engineering, and operating with integrity, transparency, and inclusion are key to building a great bicycle company.
So we built personal relationships with the leading factories in the industry, and we cut out the traditional middlemen to bring you industry-leading bikes for an unheard of price.
DESIGN YOUR UNIQUE BIKE
Let's create the perfect bike for you
We know that finding a great bike can be overwhelming. That's why we offer personal one-on-one phone consults.
Have a question on fit? Looking for the right bike for your ride style? Let us help.
As seen in
What our riders are saying
I fear I have developed a superiority complex because I see all other bikes, especially the $12,000 bling-bling road bikes, as ridiculous now. The impression I have is that if chased no one would ever catch me because I could just bunny hop over the curb and set off into woods before anyone even knew what happened. This bike screams capability.
Exceeds all expectations. The bike is basically perfect. Smashed a bunch of PRs with my out of shape for the holidays legs. Due in part to its just so damn fun to ride. Joy = speed it seems. This thing is a thoroughbred.
I’m a typical, skeptical mechanic. I’ve worked on and ridden every gimmicky bike in the book. I've never seen one this well thought out.
Hands down some of the best people. If you’re looking into getting a bike... get in touch with Randall. His business and their mission are truly all about the end user and a flawless end product."
If you’re looking for one bike to do everything, this bike can do a lot. I can’t think of a trail or road where I wouldn’t have a ton of fun riding it. I could ride uphill forever on this thing!
Usually a new bike feels a bit foreign, but the OB1 made sense to me from the second I strapped it on, even though I've never ridden a bike remotely like it. The bike was an intuitive fit from the first pedal stroke: the way the geometry felt, the way it responded to my inputs, the component choices and the way those components worked together.
Marc Mendoza, founder of Post Carry
Both the front and rear ends felt stiff under power when I needed it, like on the road bikes I’m used to, and it was just so fun to shred fire roads and singletrack.
Damn it. I don’t want to ride my regular bike now.