Introducing the all-new Polygon Helios A8 Di2 road bike, a thoroughbred performance road bicycle that raises the bar for pure, uncompromising speed and razor-sharp control.
Born from the legacy of the previous Helios A8, this next-generation machine fuses innovation with elite racing heritage, transforming every watt into forward momentum with a confidence-inspiring ride feel.
Equipped with Polygon’s race-tuned carbon frameset and the flawless precision of Shimano’s latest Ultegra R8170 Di2 semi-wireless drivetrain, the Helios A8 Di2 becomes a weapon of choice for serious riders demanding a bike that is as relentless as their ambitions. This is where control meets velocity, without compromise.
Ultegra R8170 Di2: Precision on Helios A8
At the core of the new Helios A8 Di2 road bike beats the Shimano Ultegra R8170 Di2, a groupset engineered to redefine how shifting and braking feel under pressure.
This semi-wireless electronic system delivers effortless, instantaneous gear changes, even at maximum sprint intensity, so you stay in your power zone without compromise.
Every shift is surgically precise, made possible by refined hyperglide+ technology that lets you change gears under full load, with near-silent transitions and barely any drivetrain shock.
Polygon leverages this drivetrain’s incredible Bluetooth connectivity for seamless pairing and easy customization through Shimano’s E-Tube app, giving you total control over shifting preferences on the fly.
Beyond shifting, the Ultegra R8170 Di2’s hydraulic disc brakes anchor the Helios A8 Di2 with immense stopping power and fine-tuned modulation. Carbon levers with improved ergonomics provide a tactile, confident feel no matter the weather. Combined with a semi-wireless cockpit layout, the bike’s silhouette remains clean and aerodynamic, free of messy cable clutter.
Long rides? Covered. With a battery range of up to 1,000 kilometers per charge, the Helios A8 Di2 stays race-ready, week after week.
It’s an elite performance road bike that puts absolute precision at your fingertips, so you can push harder, brake later, and ride faster with unwavering confidence.
Helios A8 Di2: Specs & Top Ride Benefits
| Component | Specification | Key Benefit |
| Frame & Fork | ACX Performance Road Carbon Frame (~880 g, 150 g lighter), ACX Carbon Tapered UCI-approved Fork (420 g) | Feather‑light stiffness with pro‑level aerodynamics for climbing and sprinting |
| Bottle Mounts | Dual downtube cage options: high/low for varied bottle sizes | Optimises aerodynamics and versatility in frame setup |
| Seatpost | Includes aero carbon + optional 27.2 mm round post | Offers both stiffness and ride-comfort customization |
| Tire Clearance | Up to 34 mm (700×28c stock) | Adaptable to rough roads without compromising speed |
| Drivetrain | Shimano Ultegra R8170 Di2, 2×12 semi-wireless, KMC X12 EPT chain | Fast, crisp shifts even under load with low-friction durability |
| Bottom Bracket | T47 threaded system, reinforced front triangle | Enhanced power transfer and long-term reliability |
| Cockpit | LINC carbon semi-integrated handlebar/stem; widths 400–440 mm by size | Combines clean aerodynamics with comfort and control in crosswinds |
| Wheels & Tires | LINC Beta 45 mm carbon disc wheels, tubeless-ready, KMC chain | Optimal aero performance, lightweight rotational mass, excellent grip, and puncture resilience |
| Brakes | Shimano Ultegra R8170 hydraulic disc (160 mm front / 140 mm rear) | Powerful, consistent stopping with responsive modulation, rain or shine |
Helios A8 Di2: Built to Dominate the Road
Every line of the Helios A8 Di2 road bike is drawn for competitive speed. The ACX carbon frame’s lightweight construction (approximately 880 g) with high-tensile modulus fibers provides exceptional lateral stiffness, translating explosive rider power directly into forward acceleration.
Both for sprinting or surging on a climb, the featherweight frame instantly responds to your every pedal move, keeping every watt efficient and effective.
Polygon pairs with Shimano’s Ultegra R8170 Di2 semi-wireless drivetrain, engineered for confident, split-second gear changes under full load.
Hyperglide+ technology, chain retention, and shifting under pressure remain buttery smooth, precisely what you need when the peloton ramps up to threshold speed.
In a crit or tight corner scenario, the flat-mount hydraulic disc brakes, with 160 mm front and 140 mm rear rotors, inspire you to brake deeper and later without fade, letting you maintain momentum while controlling entry speed.
Out on variable terrain, the 45 mm carbon wheels and 28c performance tires deliver aero gains while still offering a stable footprint, so you stay planted and predictable even in crosswinds.
Beyond its race pace, the Helios A8 Di2’s semi-wireless cockpit keeps cable routing minimal and clean, reducing drag while providing more effortless maintenance.
Paired with a battery range of up to 1,000 km, this system ensures you’re race-ready weekend after weekend, with no excuses.
In real-world conditions, whether you’re leading a high-speed breakaway, bridging gaps on rolling roads, or lining up for a full-throttle sprint, the Helios A8 Di2 road bike delivers relentless speed, unstoppable control, and the elite confidence to conquer any race scenario.
Helios A8 Di2: Value for Serious Racers
The Polygon Helios A8 Di2 road bike positions itself squarely among the most advanced performance machines available today, delivering a specification that rivals European superbikes at a fraction of their usual price ($4,699.00).
With its UCI-approved ACX carbon frame, a premium semi-wireless Shimano Ultegra R8170 Di2 drivetrain, and a purpose-built Entity carbon wheelset, the Helios A8 Di2 offers a level of engineering and performance typically reserved for top-tier pro teams.
While the plausible price point remains aggressive by high-end market standards, the value is immense.
Polygon’s manufacturing efficiency and direct-to-market approach allow riders to access pro-level innovation and a race-honed carbon chassis without the stratospheric sticker shock of European prestige brands.
In short, it’s a performance road bike designed to democratize elite racing technology.
Who Should Upgrade?
- Competitive racers seeking a UCI-certified carbon bike with flawless semi-wireless shifting
- Dedicated club riders and gran fondo athletes wanting the confidence of disc brakes, aero wheels, and a stable carbon platform
- Riders moving up from mechanical shifting who want a Di2 experience that is easier to maintain, faster to tune, and cleaner in appearance
- Anyone ready to elevate their ambitions, whether chasing podiums or personal PRs
The Helios A8 Di2 road bike is not for those who compromise. It is a thoroughbred machine, tailor-made for riders who demand the same no-excuses mentality from their equipment that they bring to every finish line.
Conclusion
The Polygon Helios A8 Di2 road bike is more than an incremental upgrade; it is a declaration of intent. Polygon has distilled years of race-proven geometry, advanced carbon layups, and the groundbreaking Shimano Ultegra R8170 Di2 system into a performance road bike that refuses to compromise.
Its combination of a featherweight yet brutally stiff carbon frame, semi-wireless drivetrain precision, and powerful hydraulic braking empowers riders to push past their limits, attack with confidence, and own every second of the road ahead.
From the local circuit to full-gas pro-level events, the Helios A8 Di2 delivers a riding experience that blends speed, control, and innovation seamlessly, a rare synergy that sets it apart in a crowded performance road segment.
For racers and serious enthusiasts who believe their equipment should be as relentless as their ambition, this is the machine that answers the call.
Read also
Check out our latest update in our YouTube channel
