In The Relentless Pursuit Of Speed
Introducing the all-new Helios A—the pinnacle of aerodynamic engineering and racing performance. Developed over three years of relentless testing and perfected with the elite UCI Continental Team, TSG, the Helios A is built to dominate any race condition.Refined to be 5.2 seconds faster than its predecessor and lighter than ever, the Helios A is meticulously optimized for speed, agility, and control. Whether battling headwinds or slicing through tight corners, its cutting-edge aerodynamics and balanced stiffness deliver an unmatched ride.This isn’t just a bike—it’s your competitive edge.
It’s light
Weight is a decisive criteria when it comes to justifying the quality of a top-of-the-range road bike. Saving a few grams on a frame while retaining its stiffness and quality presents a real challenge. Our engineers have taken up this challenge by redesigning the ACX carbon construction of our frame and fork to achieve a fantastic result, saving almost 300 grams on its frame.
Superior Power Transfer
We’ve reinforced the bottom bracket for instant power transfer and adopted a T47 threaded system for added stiffness, smooth pedaling, and zero creaks—while up front, a shortened, reinforced head tube sharpens cornering for a decisive edge in every sprint.
From racing admiration to engineering the ultimate aerodynamic machine
The downtube, as the bike’s aerodynamic core, now features dual bottle cage mounting positions—low for large bottles, high for smaller ones—to reduce drag across setups. Paired with a newly redesigned, sleeker fork, the Helios A now cuts through air more efficiently than ever.
This is performance, perfected.
With the new Helios A, Polygon redefines adaptability in road biking. The frame supports both an aero seat post (included) and a 27.2mm round option for added comfort—giving riders full control, whether tackling fast sprints or rough courses. It also fits tires from 28c to 34c, making it ultra-versatile for varying road conditions, and comes equipped with a 45mm carbon rim for balanced performance across the series.
| series | Helios A8X |
| model category | Performance roadbike 700C, 12x142mm / 12x100mm |
| frame | ACX Performance UCI Approved |
| sizes (ct) | XS, S, M, L, XL |
| frame color | Royal blue |
| headset | Integrated (IS) sealed bearing for OS head tube, 52mm. S.H.I.S. IS 52/28.6 | IS 52/40 |
| fork | ACX Performance UCI Approved, Full carbon, Taper 1 1/8" to 1 1/2" |
| handlebar | Vision Metron 5D ACR Integrated - 400mm (XS, S) / 402mm (M, L) / 420mm (XL). Rise/drop - 125mm / 6 degree. Extension - 100mm (XS, S) / 110mm (M, L) / 120mm (XL). |
| handle stem | Vision Metron 5D ACR Integrated |
| saddle | Entity Flux2 Cr-Mo Ø 7mm |
| seatpost | Carbon Aero Ø35 x 357mm (XS) / 357mm (S, M, L, XL) |
| drivetrain | Shimano Ultegra Di2 |
| crankset | Shimano Ultegra FC-R8100 52/36T - 170mm (XS, S, M) / 172.5mm (L, XL) |
| pedal | Not included |
| bottom bracket | Pressfit BB86 |
| chain | Shimano CN-M8100 12-Speed |
| cassette sprocket | Shimano Ultegra CS-R8100 11-34T |
| front derailleur | Shimano Ultegra Di2 FD-R8150 Braze-On |
| rear derailleur | Shimano Ultegra Di2 RD-R8150 Direct Attach |
| shifting lever | Shimano Ultegra Di2 ST-R8170, 2x12-speed DCL |
| brakes | Shimano Ultegra hydraulic disc BR-R8170 |
| brake lever | Shimano Ultegra BR-R8170 flat |
| rotor | Shimano Ultegra RT-MT800 F-160mm / R-140mm center lock |
| tyres | Schwalbe One Addix TLE 700x28C |
| maximum tyre size | 700x28C |
| rim | Carbon 622-21C 700C 16T tyre 622-26/32C disc tubeless ready |
| hubs | Alloy sealed bearing 24H center lock |
| wheels | Novatec carbon Road disc wheels R5 Pro-CL (50mm) |
| Frame Material | Carbon |
| Fork Material | Carbon |
| Groupset Brand | Shimano |
| Groupset Model | Ultegra Di2 |
| Shifting Type | Electronic |
| Pedals Included | No |
| Drivetrain Gearing | 2 x 12 |
| Ride Style | Aero Race |
| Series | Helios A8X |
| Model Category | Performance roadbike 700C, 12x142mm / 12x100mm |
| FRAME | ACX Performance UCI Approved |
| SIZES (CT) | XS, S, M, L, XL |
| FRAME COLOR | Royal blue |
| Headset | Integrated (IS) sealed bearing for OS head tube, 52mm. S.H.I.S. IS 52/28.6 | IS 52/40 |
| Fork | ACX Performance UCI Approved, Full carbon, Taper 1 1/8" to 1 1/2" |
| Handlebar | Vision Metron 5D ACR Integrated - 400mm (XS, S) / 402mm (M, L) / 420mm (XL). Rise/drop - 125mm / 6 degree. Extension - 100mm (XS, S) / 110mm (M, L) / 120mm (XL). |
| HANDLE STEM | Vision Metron 5D ACR Integrated |
| Saddle | Entity Flux2 Cr-Mo Ø 7mm |
| Seatpost | Carbon Aero Ø35 x 357mm (XS) / 357mm (S, M, L, XL) |
| Drivetrain | Shimano Ultegra Di2 |
| Crankset | Shimano Ultegra FC-R8100 52/36T - 170mm (XS, S, M) / 172.5mm (L, XL) |
| PEDAL | Not included |
| Bottom Bracket | Pressfit BB86 |
| Chain | Shimano CN-M8100 12-Speed |
| Cassette Sprocket | Shimano Ultegra CS-R8100 11-34T |
| Front Derailleur | Shimano Ultegra Di2 FD-R8150 Braze-On |
| Rear Derailleur | Shimano Ultegra Di2 RD-R8150 Direct Attach |
| SHIFTING LEVER | Shimano Ultegra Di2 ST-R8170, 2x12-speed DCL |
| BRAKES | Shimano Ultegra hydraulic disc BR-R8170 |
| Brake lever | Shimano Ultegra BR-R8170 flat |
| Rotor | Shimano Ultegra RT-MT800 F-160mm / R-140mm center lock |
| TYRES | Schwalbe One Addix TLE 700x28C |
| Maximum tyre size | 700x28C |
| Rim | Carbon 622-21C 700C 16T tyre 622-26/32C disc tubeless ready |
| HUBS | Alloy sealed bearing 24H center lock |
| Wheels | Novatec carbon Road disc wheels R5 Pro-CL (50mm) |
* All specifications listed are subject to change without notice. Please note that our specifications may be impacted by manufacturer component substitution changes caused by high global demand for bikes and resulting supply chain issues in the bike industry. We recommend confirming the specifications with your local Evo Cycles showroom if you have any questions.
Bike Weight: Many brands strive to list the lowest possible weight, but in reality weight can vary based on frame size, finish, hardware and accessories. The most accurate way to determine any bike's weight is to have your local showroom weigh it for you.
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