The Bianchi Aria e-Road Ultegra Di2 12-speed in Celeste / 55cm is the definitive "gentleman's racer" of the e-road world. While the newer e-Oltre focuses on hyper-modern integration and the X30 motor, the Aria e-Road remains a beloved staple for its aggressive aero geometry and the proven Mahle X35+ system.
This bike is engineered with Bianchi’s IPD (Inner Power Drive) system, meaning the motor and battery are so well-hidden that even seasoned cyclists will have to look twice at the rear hub to realize you're getting an assist. In this 12-speed configuration, it pairs the classic Italian aero-carbon feel with Shimano's latest semi-wireless electronic shifting.
E-System (Mahle X35+)
Drive Unit: Mahle Ebikemotion X35 Plus (Rear Hub), 40Nm Torque, 250W.
Battery: Mahle B1-D 250Wh, slimline integration in the downtube.
Controller: iWoc ONE (Top-tube integrated flush button with LED ring for mode/battery).
Weight Penalty: The entire system (motor, battery, wiring) weighs just 3.5kg, keeping the total bike weight exceptionally low for an e-bike.
Connectivity: BLE and ANT+ compatible (Pairs with Mahle app for GPS navigation and motor tuning).
Frameset & Fork
Frame: Aria e-Road Aero Carbon, PressFit 86.5x41mm BB, integrated seat clamp, 12x135mm rear spacing.
Fork: Bianchi Full Carbon Aero, 1.1/8" to 1.4" tapered, 12x100mm thru-axle.
Seatpost: Aria Full Carbon Aero, adjustable/reversible head (+/- 35mm).
Geometry: True Racing Geometry—this is a "fast" bike with a low stack and long reach, identical to the non-electric Aria.
Drivetrain & Brakes
Rear Derailleur: Shimano Ultegra Di2 RD-R8150, 12-Speed (Electronic).
Front Derailleur: Shimano Ultegra Di2 FD-R8150, 12-Speed (Electronic).
Shifters: Shimano Ultegra Di2 ST-R8170, 2x12-Speed.
Brake System: Shimano Ultegra BR-R8170 Hydraulic Disc.
Rotors: Shimano RT86 160mm (Front & Rear).
Crankset: Shimano Ultegra FC-R8100, 50x34T
Cassette: Shimano Ultegra CS-R8100, 11-34T.
Wheels & Tires
Wheelset: Vision Trimax Alloy Disc, 30mm rim depth, tubeless-ready.
Rear Hub: Integrated Mahle X35 Plus motor unit.
Tires: Vittoria Rubino Pro IV, 700x28c, G2.0 Graphene (Optimized for speed and grip).
Key Highlights
Zero Drag Technology: The Mahle X35+ hub motor is designed with a freewheel system that offers zero motor resistance when the assist is off or when you exceed the 25km/h (15.5mph) limit. You can ride it like a standard bike on the flats.
Electronic Perfection: The 12-speed Ultegra Di2 is the "Goldilocks" groupset—offering the same lightning-fast shifting speed as Dura-Ace but with more durable materials, perfect for the extra torque of an e-bike.
Aero Heritage: Unlike endurance-focused e-bikes (like the Giant Defy), the Aria e-Road is an Aero bike first. The tube shapes are designed to slice through the wind, making it easier to maintain high speeds even without the motor.
Iconic Presence: Finished in "Glossy Celeste," this bike carries 130 years of Italian racing heritage.