Darimo Not Round Carbon Seatpost | Colnago C68, V4Rs, C64 & V3Rs

One not-round seatpost, compatible across four Colnago frames spanning two generations: C68, V4Rs, C64 and V3Rs. This ultralight upgrade replaces the original component and saves real weight in one of the most crucial areas of the bike. Reducing weight at the seatpost and saddle — parts positioned far from the ground — meaningfully minimizes the pendulum effect and improves overall ride dynamics, whichever of these four frames you're riding.

Ultra-Lightweight Design

At just around 95 g in the 350 mm straight version, this seatpost is crafted from high-quality bidirectional and unidirectional carbon fabrics, with a carefully engineered asymmetrical laminate that delivers the right balance between minimum weight and maximum resistance — the same build quality, whether you're upgrading a current-generation V4Rs or a C64 already a few seasons into service.

Hand-Laminated for Strength Where It Matters

Every seatpost is hand-laminated to reach a genuinely record-low weight while ensuring durability and rider safety. Each section features a tailored number and orientation of carbon fiber layers, determined through Finite Element Analysis (FEA) and destructive testing — a scientific approach that guarantees consistent performance and reliability across every unit.

Revolutionary Clamping System

The newly designed clamping system on straight versions uses two ultralight Dyneema® loops, cutting weight significantly at the head of the seatpost while remaining compatible with all saddle rail types, including 7x9 mm carbon saddle rails.

Choosing the Correct Seatpost Length

Measure your current seatpost from the top of the seat clamp (top of the vertical tube) to the center of the saddle rails, then select the corresponding size from the available chart. If two sizes fit, factor in rider variation and intended use. Custom lengths up to 500 mm (or longer) are available on request — contact us for a tailored solution.