Impulso RC / GRX825 di2

The Bianchi Impulso RC GRX 825 Di2 2x12sp represents the absolute pinnacle of Bianchi's gravel racing lineup. Bearing the prestigious "Reparto Corse" (RC) badge, this bike is uncompromisingly engineered for speed, prioritizing aerodynamic efficiency, ultra-low weight, and rapid power transfer over casual bikepacking utility. Heavily borrowing computational fluid dynamics data from Bianchi’s top-tier Oltre aero road bikes, the high-modulus carbon frame features essential, incredibly clean lines with a fully integrated cockpit and a D-shaped aero seatpost. To maintain its pure racing pedigree, Bianchi deliberately omitted excess mounting points for bags or extra bottles, ensuring there is no unnecessary weight or aerodynamic drag.

The componentry on this specific model is nothing short of elite. At its core is the brand-new Shimano GRX 825 Di2 12-speed electronic groupset, which delivers lightning-fast, flawless shifting even under heavy pedalling loads or in deep mud. To ensure competitive riders can pace their efforts perfectly, the crankset comes equipped out of the box with a 4iiii Precision 3 power meter. The bike rolls on Bianchi’s proprietary Reparto Corse RC43 carbon wheels, featuring a 43mm aerodynamic profile and ultra-smooth ceramic bearings. Coupled with an aggressively flared carbon cockpit and tire clearance for up to 42mm, the Impulso RC is a purpose-built weapon designed to dominate fast-paced, demanding gravel races.

Frameset & Cockpit

• Frame: IMPULSO RC Disc, HM-HS Carbon Fiber Composite, Flat Mount, PressFit 86.5x41 bottom bracket, 12x142mm thru-axle, SRAM UDH hanger compatible.

• Fork: Bianchi Impulso Integrated Fork, HM-HS Carbon Fiber Composite, Flat Mount, 12x100mm thru-axle, 42mm tire clearance.

• Headset: Bianchi Custom Acros ICR (Fully internal cable routing).

• Handlebar/Stem: Reparto Corse AeroFlare integrated carbon cockpit (16° Flare, 120mm Drop, 80mm Reach).

• Seatpost: Bianchi Custom D-Shape carbon, 20mm offset.

• Saddle: Bianchi RC139 Carbon (carbon shell and rails, 145g).

Drivetrain & Brakes

• Shifters: Shimano GRX Di2 ST-RX825, 2x12-speed electronic.

• Rear Derailleur: Shimano GRX Di2 RD-RX825.

• Front Derailleur: Shimano GRX Di2 FD-RX825.

• Brakes: Shimano GRX BR-RX820 Hydraulic Disc.

• Rotors: Shimano RT-CL800 IceTech, 160mm (Front & Rear).

• Cassette: Shimano CS-HG710, 12-speed, 11-36T.

• Crankset: Shimano GRX 820 FC-RX820, 48/31T with integrated 4iiii Precision 3 single-sided power meter.

• Chain: Shimano CN-M7100.

• Bottom Bracket: Shimano SM-BB72-41B, PressFit.

Wheels & Tires

• Wheelset: Reparto Corse RC43 Ceramitech, high-modulus carbon rims, 43mm depth, 25mm internal width, sealed ceramic bearings, Tubeless Ready.

• Tires: Pirelli Cinturato Gravel RC, 700x40c, 60TPI TLR, folding with tan sidewalls.

Key Highlights

• Shimano GRX 825 Di2: This next-generation 12-speed electronic gravel groupset offers improved ergonomics, enhanced brake modulation, and incredibly crisp wireless shifting that remains reliable regardless of trail conditions.

• Aero Gravel Frame: The frame shapes, fork integration, and D-shaped seatpost are all aggressively aero-optimized. The geometry features a slightly shorter stem and longer reach than traditional gravel bikes, mirroring modern cross-country mountain bikes to maximize stability at blistering speeds.

• Integrated Power Meter: Training and racing with precision is critical, and the inclusion of the 4iiii Precision 3 power meter directly on the GRX crankset means you have highly accurate wattage data immediately available without needing an expensive aftermarket upgrade.

• RC43 Ceramitech Wheels: Specifically designed for this bike, these 43mm deep carbon wheels offer a distinct aerodynamic advantage on flat, exposed gravel sectors. The premium ceramic bearings significantly reduce rolling resistance compared to standard steel bearings.

• AeroFlare Cockpit: The fully integrated, one-piece carbon handlebar and stem hide all brake hoses internally, drastically reducing front-end drag. The 16-degree flare provides excellent leverage and control when descending in the drops.