A bike isn’t just a well-finished carbon-and-titanium frame. It’s a set of geometric choices that decide, before the first pedal stroke, how it’s going to behave. Here’s how we thought through the B01’s.
A bike isn’t just a well-finished carbon-and-titanium frame. It’s a set of geometric choices that decide, before the first pedal stroke, how it’s going to behave. Here’s how we thought through the B01’s.
An all-road geometry, thought through down to the smallest detail
The B01 was designed around a precise balance between agility and stability. Up front, the ride is sharp and responsive, especially out of the saddle and on hard efforts, while the rear delivers composure and control at speed.
That balance comes from deliberate geometric choices. A relatively short trail contributes to the liveliness of the front end and the bike’s playful character. Conversely, stability is reinforced by the rear of the bike and by a slightly extended reach, allowing for a lower, more aerodynamic position. That reach is paired with a shorter stem, to preserve the comfort and accessibility of the cockpit.
Chainstay length also contributes to overall stability, while providing the clearance needed for larger-volume tires. Finally, the choice of bottom bracket (BB drop) lowers the center of gravity and reinforces the sense of stability. A natural, balanced position builds rider confidence, encourages you to relax into the ride, and lets you go fast, for a long time.
This geometry is a carefully managed trade-off, built to combine speed and agility on the road with speed and stability on loose terrain — from gravel to forest roads.
The secret is in the assembly
“The B01’s agility and performance come from a unique technological pairing. We designed carbon layups specific to each tube, optimizing the frame’s response. And the secret lies in the assembly: our 3D-printed titanium parts are bonded to the carbon through a very precise structural gluing process. This glue joint acts as a harmonizer between the carbon’s responsiveness and the titanium’s filtering. The result? A bike that isn’t just stable thanks to its 435mm chainstays, but that delivers exceptional mechanical efficiency from the very first pedal stroke.”
Tire clearance: up to 43mm
The B01 accommodates tires up to 42mm, depending on rim width. In practice: 28 to 35mm for road use without throwing off the bike’s proportions, 30 to 40mm for fast gravel, and 40 to 42mm for touring and long rides on natural terrain.
The full geometry table, for those who want to know it all
Want to go further: the interactive geometry chart
If you want to dig deeper — compare sizes against each other or explore the measurements in detail — our full chart is available on Bikeinsights, with a toggle to switch between the B01’s Road and Gravel configurations: https://bikeinsights.com/bikes/69b1be2588053c001b5fe5b4-baumier-b01
Bottom line
Sharp up front, composed out back — the B01 is built as a carefully managed trade-off, not as a sum of isolated numbers. Last chapter of the Product Bible drops this week: the 5 ways to build one, from the mechanical Timeless to the Hors Catégorie.
