Specialissima 105 di2

The Bianchi Specialissima Shimano 105 Di2 (YWB7SI) is an all-around lightweight climbing road bike designed for steep mountain passes, high-speed descents, and fast competitive road riding. Constructed around a re-engineered Specialissima full carbon frame and fork with Countervail vibration-damping composite technology and Universal Derailleur Hanger (UDH) compatibility, it merges aerodynamic tube shaping with lightweight chassis geometry. Weighing approximately 7.8 kg (17.2 lbs), the build features clean internal cable routing through an integrated aero carbon cockpit, an aero seatpost, and flat-mount disc brake integration.

Driven by Shimano’s 105 Di2 2x12 wireless electronic drivetrain, this setup delivers crisp gear changes across a compact 50/34T crankset and a wide 11-34T (or 11-36T) cassette. The bike rolls on carbon Bianchi B 49R tubeless-ready carbon wheels wrapped in fast-rolling Continental Grand Prix tires. Slowed by Shimano 105 hydraulic disc brakes with dual 160mm rotors, the Specialissima 105 Di2 is built to deliver sharp acceleration on steep gradients while keeping handling composed on technical downhills.

Specifications Breakdown

Frameset & Cockpit

• Frame: Specialissima Carbon, Electronic Groupsets Only, Fully Integrated Internal Cable Routing (ICR), Flat Mount Disc, UDH™ Compatible, PressFit 86.5x41mm BB.

• Fork: Specialissima Full Carbon Aero, ICR 1.5" Integrated Head, Flat Mount Disc, 12x100mm Thru-Axle.

• Headset: Acros IS52 ICR Integrated Cable Routing System.

• Integrated Cockpit: Reparto Corse Carbon Integrated Handlebar/Stem Drop 125mm, Reach 80mm.

• Seatpost: Specialissima Full Carbon Aero Seatpost, Custom Profile, 0mm / 20mm Offset options.

• Saddle: Prologo Nago R4 PAS 

• Bar Tape: Prologo Plaintouch Soft Microfiber (2.5mm).

Drivetrain & Brakes

• Front Derailleur: Shimano 105 Di2 FD-R7150, Electronic Braze-On.

• Rear Derailleur: Shimano 105 Di2 RD-R7150, 12-Speed Electronic.

• Shifters / Brake Levers: Shimano 105 Di2 ST-R7170, Dual Control 24-Speed.

• Brakes: Shimano 105 BR-R7170 Hydraulic Disc.

• Rotors: Shimano SM-RT70 / RT-CL700 Centerlock, 160mm Front / 160mm Rear.

• Crankset: Shimano 105 FC-R7100, Hollowtech II, 50x34T.

• Cassette: Shimano 105 CS-R7100 / CS-R7101, 11-34T (or 11-36T), 12-Speed.

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

• Chain: Shimano CN-M7100 12-Speed.

Wheels & Components

• Wheelset: Reparto Corse B 49R Carbon (49mm Profile, 25mm Internal Width) Tubeless Ready, Ratchet Hub System.

• Tires: Continental Grand Prix TR, 700x30C Tubeless Ready.

• Max Tire Clearance: Up to 32mm.

• Approx. Weight: ~7.8 kg / 17.2 lbs (varies by size).

Key Highlights

• Shimano 105 Di2 12-Speed Electronic Shifting: Delivers reliable wireless gear changes with custom button configuration options via the Shimano E-Tube app.

• Aero-Optimized Lightweight Carbon Chassis: Combines truncated tube shapes derived from Bianchi's aero research with a lightweight frame layout for high climbing performance.

• Fully Internal Cockpit Cable System: Hides hydraulic hoses completely inside the handlebar and headset for a clean aesthetic and reduced aerodynamic drag.

• Factory Carbon Wheelset Integration: Outfitted with tubeless-ready carbon wheels designed to balance stability in crosswinds with low rotational weight on climbs.

• UDH Dropout Standard & Hydraulic Braking: Uses SRAM's Universal Derailleur Hanger standard for easy part replacement, paired with dual 160mm hydraulic disc brakes for stopping power on fast descents.