Chat ZaloUltralight 800g ACX carbon frame
The UCI-approved ACX carbon frame weighs just 800g; truncated-airfoil tube shapes cut drag by 31% compared with the previous generation.
Polygon · Road bikes
Polygon HELIOS A8 Di2
The all-new Helios A — faster and lighter
- New 2026
- Aero Road
- 800g ACX carbon frame
- Shimano Ultegra Di2
Retail price125.800.000₫
- Genuine Polygon bike, distributed by Spinlab
- Free shipping on orders from 2,000,000₫
- Free size advice via our hotline
The all-new Helios A — faster and lighter
Helios A8 Di2 has the 800g aero ACX carbon frame, a Shimano Ultegra Di2 2x12-speed electronic drivetrain, LINC Beta 45mm carbon wheels and Pirelli P Zero Road TLR tyres — precise shifting and high speed for both training and racing.
Versions in the Helios A range: HELIOS A0 AXS · HELIOS A9 Di2 Power · HELIOS A9 Di2 · HELIOS A8 Di2 Power · HELIOS A8 Di2 · HELIOS A7 Di2
Key features
Aerospace-inspired aero tubes
Down tube, seatpost and head tube use truncated airfoil shapes — the aero efficiency of a teardrop while staying stable when pedalling.
34mm tyre clearance
Fits tyres up to 34mm; wider tyres at lower pressure increase the contact patch and reduce rolling resistance — smoother and faster on rough roads.
LINC semi-integrated carbon cockpit
Aerodynamic fully internal cable routing that is still as easy to adjust as a separate bar and stem.
Technical specifications
Frameset
- Frame
- ACX PERFORMANCE UCI APPROVED
- Fork
- ACX PERFORMANCE UCI APPROVED
- Frame Color
- MIDNIGHT PINE / CHROME ROCKET
- Decal Color
- HOLOGRAPHIC SILVER
Drivetrain
- Shifter
- SHIMANO ULTEGRA Di2 ST-R8170, 2x12-SPEED
- Crank
- SHIMANO ULTEGRA FC-R8100 52/36T
- Cassette
- SHIMANO ULTEGRA CS-R8101-12 11-34T
- Rear Derailleur
- SHIMANO ULTEGRA Di2 RD-R8150 DIRECT ATTACH
- BB
- TOKEN T47 85.5 FOR 24mm SPINDLE
- Chain
- KMC X12 EPT 12-SPEED
Cockpit
- Saddle
- LINC FLUX2, CR-MO ø 7mm
- Seatpost
- CARBON AERO, DxL: AERO 35 x 351mm
- Handlebar
- LINC CARBON, W: 400mm (XXXS, XXS, XS) / 420mm (S, M) / 440mm (L, XL), BB: 31.8mm, R/D: -134.2 mm (XXXS, XXS, XS) / -138.2mm (S, M, L, XL), B/R: 92.5mm (XXXS, XXS, XS) / 89.7mm (S, M, L, XL)
- Handlestem
- CARBON, EXT: 90mm (XXXS) / 100mm (XXS, XS) / 110mm (S, M) / 120mm (L, XL), BB: 31.8mm, R/D: (-7.5)degree
- Headset
- INTEGRATED (IS) SEALED BEARING FOR OS HEAD TUBE, IS 52/28.6 | IS 52/40
Wheel & Tire
- Wheel Set
- LINC BETA CARBON DISC (45mm) W/ TUBELESS TAPE INSTALLED
- Wheel Size
- 700C
- Tire
- PIRELLI PZERO ROAD TLR 700x28C
- Rim
- F: CARBON 622-22 20H FOR TYRE 622-28/62 DISC TUBELESS READY / R: CARBON 622-22 24H FOR TYRE 622-28/62 DISC TUBELESS READY
- Hub
- F: ALLOY THRU AXLE 12x100mm 20H SEALED BEARINGS CENTER LOCK / R: ALLOY THRU AXLE 12x142mm 24H SEALED BEARINGS CENTER LOCK
- Spokes
- F: STAINLESS DOUBLE BUTTED NDS:278mm DS:280mm / R: STAINLESS DOUBLE BUTTED NDS:272mm DS:274mm
Brakes
- Brake lever
- SHIMANO ULTEGRA ST-R8170
- Brake Caliper
- SHIMANO ULTEGRA HYDRAULIC DISC
- Rotor
- SHIMANO ULTEGRA CL800 F:160mm / R:140mm CENTER LOCK
Specifications may change between shipments. Please contact Spinlab to confirm the bike's configuration in Vietnam.
Frame geometry
| Specifications | XXS | XS | S | M | L | XL |
|---|---|---|---|---|---|---|
| Height | 151-161 | 154-164 | 162-170 | 168-176 | 174-181 | 180-187 |
| Seat Tube Length (A) | 420 | 457 | 489 | 499 | 518 | 536 |
| Seat Tube Angle (B) | 74.7 | 74.3 | 74 | 73.7 | 73.3 | 73 |
| Effective Seat Tube Angle (C) | 74.7 | 74.3 | 74 | 73.7 | 73.3 | 73 |
| Head Tube Length (D) | 100 | 110 | 120 | 130 | 150 | 170 |
| Head Tube Angle (E) | 71.3 | 71.5 | 72.3 | 72.5 | 72.8 | 73 |
| Effective Top Tube (F) | 513 | 529 | 540 | 556 | 570 | 598 |
| BB Height (G) | 266 | 268.5 | 271 | 271 | 272.5 | 272.5 |
| BB Drop (H) | 78 | 75.5 | 73 | 73 | 71.5 | 71.5 |
| Chainstay Length (I) | 410 | 410 | 410 | 410 | 410 | 410 |
| Wheelbase (J) | 976 | 988 | 985 | 996 | 1005 | 1024 |
| Reach (K) | 375 | 385 | 390 | 400 | 405 | 420 |
| Stack (L) | 503 | 511 | 523 | 533 | 551 | 571 |
| Standover Height (M) | 685 | 720 | 752 | 761 | 780 | 799 |
The selected size column is highlighted. Figures from Polygon Bikes.
FAQ
How do I choose a size?
Refer to the “Rider height” row in the Frame geometry table. If your height falls between two sizes, contact Spinlab for advice based on your riding position and needs.
What warranty does the bike have?
Genuine Polygon bikes distributed by Spinlab are covered by Polygon's warranty policy. Call our hotline for details of conditions and duration.
Can I upgrade components?
Yes. Contact Spinlab for advice on suitable upgrades, such as Vittoria tyres or Emume handlebar tape.
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