Bianchi D2 Chrono Frameset

Built for the discipline where seconds decide races, the Bianchi D2 Chrono Frameset is a purpose-built time trial and triathlon platform from one of cycling's oldest and most decorated marques. Bianchi has been building race bikes since 1885, and the D2 Chrono carries that racing lineage into the discipline where aerodynamics matter more than almost anything else: riding alone, against the clock, holding a fixed position for an hour or more with no draft and no letup.

The frame is a carbon monocoque structure, shaped around drag reduction rather than general-purpose versatility. Deep tube profiles run through the front triangle and chainstays, with airflow-optimized shaping carrying into an integrated carbon aero fork that pairs deep blades with a smooth head tube transition — the detail that matters most at the front of the bike, where the frame first meets the wind. Cable routing is fully internal, keeping the surfaces that see the most airflow clean and uninterrupted rather than cluttered with housing.

At roughly 1,350 grams including the seatmast and clamp, the D2 Chrono sits in the same weight range as elite-level time trial framesets — light enough that it doesn't work against a rider over a long, sustained effort, but stiff enough to hold form when every watt needs to reach the road instead of flexing through the frame. The geometry is built around the steep seat angles that define a proper triathlon and time trial position, rotating the rider forward over the bottom bracket to open up hip angle and let them hold an aggressive aero tuck without fighting the bike to stay there.

Because it's sold as a frameset rather than a complete build, the D2 Chrono is a starting point rather than a finished bike — which is exactly what most triathletes and time trialists building a dedicated race machine actually want. The integrated seatmast and extended clamp allow for fine fore-aft and height adjustment once a rider's position has been dialed in, whether that position comes from a previous TT bike or a professional bike fit. The frame accommodates rim or disc brake builds depending on how it's spec'd, giving a builder room to match wheels, brakes, and cockpit to a race plan rather than settle for a fixed component list.

That frameset-only approach also changes the value equation. A complete time trial or triathlon bike from a major brand routinely runs several times the D2 Chrono's price before a rider adds a single upgrade. Starting from a lightweight, aerodynamically shaped carbon frame lets a builder direct that budget toward the wheels, cockpit, or drivetrain that will move the needle most for their specific event — a Half Ironman leg, an Olympic-distance run into a bike split, or a flat individual time trial where position and airflow decide the result.

This is a frame for a rider who already knows what a time trial bike needs to do and wants to build toward it with intention, not one meant to double as a training or group-ride machine. For triathletes and TT specialists assembling a purpose-built rig from the frame up, the D2 Chrono offers a lightweight, aero-focused foundation with genuine Italian racing pedigree behind it.