Benefits

Lightness defines the O2 VAM. Designed for climbing, its weight is an impressive 6.2kg for a 54 with Shimano Dura-Ace Di2, unparalleled among disc brake bikes. That minimal weight allows professionals to toe the line on race day close to the 6.8kg limit, even after adding pedals, cages, transponder, and race numbers. This weight advantage is a shared aspiration for all riders preparing to ascend thousands of metres. Achieving such lightness, the new O2 VAM combines ultra-high-grade materials, stiffness-to-weight optimized tube shapes through supercomputer calculations, and an advanced manufacturing process that required a whole new factory.

The O2 VAM doesn’t compromise on aerodynamics. Why an aero climbing bike? Climbs are only part of the ride, and aero efficiency matters for the rest of the journey. Also, pro riders ascend so quickly that aerodynamics are significant even at typical 8% gradients. Striking the balance between lightness and low drag is challenging, but our team nailed it. In the wind tunnel, the new O2 VAM trails the OSTRO VAM by only 5W at wind angles of 0-5 degrees, a testament to its efficiency. This translates to a faster climbing bike on the road, outperforming many heavier dedicated aero bikes from other brands.

Finally, the O2 VAM doesn’t falter in stiffness and handling. Matching the rigidity of the robust OSTRO VAM, it delivers an exhilarating sensation when you push the pedals. The shared handling geometry offers superb control at high speeds on descents, confidence at large lean angles, and impressive agility. After all, a mountain bike needs to perform as well on the descent as it does on the ascent. The O2 VAM checks all the boxes.

Get a head start in this cycling revolution. Secure your O2 VAM from the first production!

Features

New Black Inc 28//33 wheels

The new 28//33 wheelset was designed to complement the new O2 VAM and represents an equally remarkable breakthrough in lightness and aerodynamics. The 28//33 weighs a feathery 1,146g as tubeless clinchers optimized for 28mm tires. They feature differentiated front and rear depths of 28 and 33mm, measure 23mm internally and 28mm externally, and use exceptionally light and strong carbon fiber spokes. As well as a substantial weight saving, they also reduce drag by 10g from the previous THIRTY wheelset and greatly boost stiffness, and therefore responsiveness and acceleration.

Sublime ride comfort

The most visually apparent features of the O2 VAM relate to ride comfort as well as weight saving. The external seatpost, ultra-thin toptube and dropped seatstays all work together to promote controlled deflection at the saddle. The latest UCI rules allow a minimum tube thickness of 10mm and that is exploited in the toptube ahead of the seat cluster. This section bows in a controlled way under the reverse force of the rider on the saddle when the bike hits a bump. In combination with the external seatpost, which eliminates the mass and overlap of a conventional seatpost, this enables a small amount of ‘travel’ at the saddle over rough roads.

Next-gen aero

The sheer speed of the new O2 VAM is unprecedented for its category. It’s made possible by our engineers’ ground-breaking work to create all-new, aggressively truncated airfoil shapes for key frame sections. A focus on some complicated aerodynamic principles – centred around low Reynolds number airflow behaviour and first learned during development of the OSTRO Gravel – has made the new O2 VAM especially fast in ‘low yaw conditions’, that is when there is either no wind, a straight headwind, or a slight crosswind. Our team gained the ability to manipulate the formation of the ‘laminar separation bubble’ and subsequent reattachment of the airflow, reducing the drag.