Bianchi
ImpulsoRC GRX 825 Di2 2x12sp
The Bianchi Impulso is a dedicated aero gravel race platform designed for high-speed efficiency and pack dynamics rather than backcountry adventure. Developed by Bianchi’s Reparto Corse, the current generation borrows aerodynamic cues from the brand's top-tier road bikes, resulting in a highly integrated chassis focused on power transfer and forward momentum. Moving away from the aluminum Allroad lineage, this carbon frameset utilizes a progressive geometry tailored for fast, rolling terrain and competitive events. The platform is built around an integrated fork-to-head-tube design, fully internal cable routing, and a proprietary D-shaped seatpost to minimize drag. With tire clearance capped at 42mm, the Impulso clearly signals its intentions: it prioritizes speed on groomed gravel and dirt roads over technical singletrack capability. It suits the aggressive gravel racer or fast-paced group rider looking for a sharp, road-adjacent feel off the pavement.
Spec sheet.
Every component shipped with this build.
Geometry & fit.
8 sizes published.
The Impulso utilizes an aggressive, race-oriented geometry that places the rider in a low, aerodynamic posture. A relatively steep 71.5-degree head tube angle and 74-degree seat tube angle keep the handling quick and the rider’s weight forward for optimal power delivery. Paired with a 70mm bottom bracket drop, the bike maintains high-speed stability without sacrificing the agility needed to navigate tight pack dynamics.
Fit and cockpit integration vary significantly across the sizing and build tiers. The flagship RC models feature Bianchi’s Reparto Corse AeroFlare one-piece carbon cockpit, which dictates a fixed stem length and bar width per frame size, emphasizing aerodynamic gains but limiting fit adjustments. The Pro and Comp builds utilize a more traditional two-piece Velomann alloy stem and handlebar setup, offering easier customization for reach and drop. Across all builds, the proprietary D-shaped carbon seatpost features a 20mm offset, pushing the rider slightly rearward to balance the steep seat tube angle.
Where the handlebar sits relative to the bottom bracket — the single most important fit pair.
01Fit geometry5 values
03Handling geometry7 values
Which size should I buy?
Slide your height to see the recommended size. GearWise's fit algorithm works from the published stack, reach, and ETT — the brand's own recommendation may differ.
→Calculated from GearWise's own stack / reach / ETT algorithm — the brand's size chart may recommend a different size, and a proper bike fit beats any calculator.
The lineup.
5 builds, ranging $3,200 – $7,500.
The Impulso lineup spans three distinct tiers—Comp, Pro, and RC—all sharing the same core carbon frame shape, 42mm tire clearance, and SRAM UDH compatibility. The entry-level Comp builds utilize mechanical Shimano GRX 610 12-speed drivetrains paired with heavy-duty Fulcrum RapidRed alloy wheels. These models offer a strong value foundation for privateer racers, though the heavier rolling stock adds noticeable weight.
Stepping up to the Pro tier introduces a full Shimano GRX 820 mechanical groupset and upgrades the rolling stock to Velomann Terbium carbon wheels, significantly reducing rotational weight for better climbing response.
The flagship RC models represent the fully integrated race spec. These builds move to electronic shifting with either Shimano GRX 825 Di2 or the 13-speed SRAM RED XPLR AXS. The RC tier also introduces the one-piece AeroFlare carbon cockpit, Reparto Corse 43mm deep-section carbon wheels with ceramic bearings, and factory-installed power meters—a single-sided 4iiii unit on the Shimano build and a SRAM RED power meter crankset on the XPLR model.
From the press.
1 review from the cycling press.
Reviewers characterize the Impulso as a highly efficient, purpose-built race machine that excels on fast, rolling courses. The chassis delivers immediate power transfer, with testers noting the "super stiff frame" feels "really responsive when you put the power down" (YouTube). This rigidity translates to excellent straight-line speed and pack-riding efficiency, though it comes with a tradeoff in overall comfort. On rougher terrain, the ride "felt a little harsher than some other bikes" that engineer more compliance into their carbon layups (YouTube).
Handling is generally described as stable and predictable at speed. Despite the firm ride quality, testers felt secure on descents, noting the bike remained "planted" and they were "not limited by the frame at all" when navigating downhill sections (YouTube).
The primary critique centers on the weight of the entry-level builds. While the frame itself is praised as a high-quality foundation, the stock alloy wheels on the Comp models make the bike feel somewhat "sluggish going uphill" (YouTube). Reviewers consistently suggest that upgrading the rolling stock reveals the frame's true climbing potential, transforming it into a sharper competitive tool.
Compared to.
Most-viewed comparisons.
