Team TotalEnergies will race a new Cube Litening Aero C:68X on today’s first stage of the 2026 Tour Auvergne-Rhône-Alpes (formerly known as the Critérium du Dauphiné).
The bike technically remains unreleased, with the team and brand tight-lipped on details, but it is distinctive for its sloping seat post insertion point.
Most bikes have a ‘level’ collar zone around the circumference of the seat post, but the new Cube’s tapers dramatically at the rear, exposing more of the seatpost behind.
In theory, this could allow the seatpost to flex more to improve compliance, but in this instance the seatpost has a distinctive teardrop shape. Here, this could have been optimised aerodynamically beyond the typical flatback designs often seen, but with compliance gained back through the extra exposure.
Given the seat tube tapers around the rear tyre, there isn’t a lot of insertion space, so the two fixing bolts on the rear of the seat tube are likely there to serve as two fastening points for a wedge clamp.
Despite this, the inside corner of this junction remains ‘filled in’, and as with the current bike it’s likely purely for aerodynamic gain (given the seatpost clamp isn’t housed here).
The seat stays join to the seat tube in a dropped position, but with a tapering flare to the rear axle.
At the front, things are more typical of aero and all-rounder race bikes. Matteo Vercher’s bike pictured is a size 50cm, but the head tube and down tube are very deep but narrow, arguably pushing up to the limit of the UCI’s 8:1 tube ratio regulation.
Cube appears to have stuck with a standard headset and steerer layout, as opposed to an offset bayonet design as seen on the Factor One, Cervélo S5 and Colnago Y1Rs.
Tyre clearance appears to be upped from the 31mm measured maximum of the current bike, but not to the same extreme as the prototype Orbea aero race bike we exclusively spotted on Friday.
The bottom bracket area has a similar shelf to the Orbea on the non-drive side, which we suspect is there to improve airflow along the chainstays and improve stiffness.
Also asymmetrical are the fork dropouts – on the drive side the zone is squared off to a point, while the brake side is narrower, with much of the real estate taken up by the thru-axle.
No official geometry figures have been published, but the downtube doesn’t feature a cutout, suggesting the front wheel could be pushed further forward than some race bikes.
This effective slackening of the front end might serve to ease the handling.
The bike also features a new-looking cockpit. The current model has a down-kinking stem, but this one extends forward at a single angle. The tops are also notably broad.
Vercher’s bike is specced with a Newmen Streem A.49/A.54 Vonoa wheelset, featuring the brand’s hidden valve system. This takes the form of a smaller valve recessed inside of the rim, with access granted via an extension valve. We’ll bring official details of the new Cube Litening Aero C:68X when we have them.
