Polygon Helios A8X (Blue)
AIBPA28A8X5LG2
An aero race bike for riders chasing podiums, built with three years of UCI Continental Team development to shave grams and seconds off everything that came before it.
Overview
The Helios A8X is built around an ACX Performance carbon frame, UCI-approved and redesigned to shed nearly 150 grams without giving up stiffness. A reinforced bottom bracket with a T47 threaded system delivers instant power transfer with zero creaking, while a shortened, reinforced head tube sharpens cornering precisely when it matters most — in a sprint.
Power runs through a full Shimano Ultegra Di2 2x12-speed electronic groupset, with Ultegra hydraulic disc brakes for consistent stopping in any condition. The aerodynamic downtube carries dual bottle cage positions to minimize drag whatever your setup, paired with a redesigned, sleeker fork and 50mm Entity WR5 carbon wheels that cut through air more efficiently than the bike it replaces.
It's built for riders who want genuine race performance, developed and tested alongside the elite UCI Continental Team TSG rather than engineered in isolation.
Why You'll Like It
Nearly 150 grams lighter
The redesigned ACX carbon frame trims weight without sacrificing the stiffness a race bike needs under hard efforts.
Electronic shifting that never misses a beat
Shimano Ultegra Di2 2x12-speed delivers instant, precise shifts exactly when you need them, in a sprint or on a climb.
A frame built for real-world versatility
Tire clearance from 28c to 34c and support for both an included aero seatpost and a 27.2mm round option mean this bike adapts to fast sprints or rougher courses.
Aerodynamics with real-world flexibility
Dual bottle cage positions on the downtube reduce drag across different bottle setups, not just a single idealized configuration.
Race-proven, not just race-styled
Three years of development with UCI Continental Team TSG back up every design decision, measured to be 5.2 seconds faster than its predecessor.
Who Is It For?
The Helios A8X is built for riders who want genuine race performance — club racing, competitive group rides, or simply wanting the fastest bike available at this price point.
In India, that means riders training for road racing circuits or serious club rides who want aero gains and electronic shifting without the price tag of a boutique European brand — this is a bike built to be raced, not just ridden to the coffee shop.
It also suits an experienced rider upgrading from an older mechanical groupset who wants the precision and consistency electronic shifting brings to hard efforts.
Good to Know
The aero seatpost is included, but the frame also supports a 27.2mm round seatpost if you want a touch more comfort on rougher roads — worth knowing the option exists.
50mm carbon wheels come with tubeless tape pre-installed, so a tubeless tire setup is straightforward whenever you're ready to make the switch.
Technical Specifications
- Frame: ACX Performance, UCI approved
- Fork: ACX Performance, UCI approved, taper 1-1/8" to 1-1/2"
- Bottom Bracket: T47 threaded
- Chain: 12-speed chain
- Crank: Shimano Ultegra FC-R8100, 52/36T, 170mm (XS/S/M) / 172.5mm (L/XL)
- Shift Levers: Shimano Ultegra Di2 ST-R8170, 2x12-speed
- Cassette: Shimano Ultegra CS-R8100-12, 11-34T
- Front Derailleur: Shimano Ultegra Di2 FD-R8150, braze-on
- Rear Derailleur: Shimano Ultegra Di2 RD-R8150, direct attach
- Grip/Tape: N/A - specific spec not confirmed in available sourcing
- Handlebar: Vision Metron 5D ACR integrated, W: 400mm (XS/S) / 420mm (M/L/XL)
- Stem: Vision Metron 5D ACR integrated, 100mm (XS/S) / 110mm (M/L) / 120mm (XL), 6°
- Saddle: Entity Flux2, Cr-Mo Ø7mm
- Seatpost: Carbon aero, 35x337mm (XS) / 357mm (S/M/L/XL)
- Front Brake: Shimano Ultegra hydraulic disc
- Rear Brake: Shimano Ultegra hydraulic disc
- Front Wheel: Entity WR5 Disc (50mm), tubeless tape pre-installed
- Rear Wheel: Entity WR5 Disc (50mm), tubeless tape pre-installed
- Front Tire: Schwalbe One Addix TLE, 700x28C
- Rear Tire: Schwalbe One Addix TLE, 700x28C
- Pedal: N/A - not confirmed in available sourcing
- Weight: N/A - not confirmed in available sourcing
Additional Information
- Country of Origin: Indonesia
- Imported By: BLITZ, Gat No. 399, Milkat, 2289, Nagar Rd, Sai Satyam Park, Wagholi, Lonikand, Pune - 412207, India.
- Net Quantity: 1N
- Customer Care Address: 291, 10 Main, 5 Block, Jayanagar, Bangalore - 560041. Ph: (080)47183232, Email: support@bumsonthesaddle.com
- Commodity: Bicycles
