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Today’s Deals2025 Polygon
HELIOS A8X
A carbon frame race bike with high-end components and shimano ultegra hydraulic disc brakes.
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Manufacturer Price
$4,699| Frame | Carbon |
|---|---|
| Fork | Carbon |
| Wheels | 700c Carbon |
| Drivetrain | 2 × 12 Electronic |
| Groupset | Ultegra, Ultegra Di2 |
| Brakes | Shimano Ultegra Hydraulic Disc |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full HELIOS model range
View Comparison151cm – 161cm
154cm – 164cm
162cm – 170cm
168cm – 176cm
174cm – 182cm
179cm – 187cm
Jun 2025 · Alvin Holbrook
The upated Polygon Helios A road bike cuts 150 grams, adds SRAM UDH and a threaded bottom, and an aim toward improved livability.
May 2025 · Alex Hunt
Polygon’s Helios A undercuts the big brands and claims to offer all-round race performance. Can it deliver on both price and ride?
Undercuts big brands on price
34 mm tyre clearance for versatility
Ability to swap between proprietary aero seatpost and standard 27.2 mm round post
Potential for greater compliance and comfort with round seatpost
Brand seemingly unsure how to define the bike (race or endurance)
Frame geometry remains fixed, limiting transformation into a true endurance bike
| Frame | carbon BB Standard: BB86/BB92, Press Fit Color: Jet Black |
|---|---|
| Fork | ACX PERFORMANCE UCI APPROVED, TAPER 1-1/8" TO 1-1/2" |
| Shock | - |
| Bottom Bracket | SHIMANO SM-BB92-41B, PRESSFIT BB86 |
| Headset | INTEGRATED (IS) SEALED BEARING FOR OS HEAD TUBE, IS 52/28.6 | IS 52/40 |
| Stem | Vision Metron 5D ACR Integrated, 100mm Length (XS-S), 110mm Length (M-L), 120mm Length (XL), 6-Degree |
| Handlebar | VISION METRON 5D ACR INTEGRATED, W: 400mm (XS, S) / 420mm (M, L) / 420mm (XL), BB: INTEGRATED, R/D: 125mm, B/R: 80mm |
| Saddle | ENTITY FLUX2, CR-MO ø 7mm |
| Seatpost | CARBON, AERO 35 x 337mm (XS) / 357mm (S, M, L, XL) Type: Rigid |
| Pedals | - |
| Rear Derailleur | SHIMANO ULTEGRA Di2 RD-R8150 DIRECT ATTACH |
|---|---|
| Front Derailleur | Shimano Ultegra Di2 FD-R8150, Braze-On |
| Crank | SHIMANO ULTEGRA FC-R8100 52/36T, CRANK ARM: 170mm (XS, S, M) / 172.5mm (L, XL) |
| Shifters | SHIMANO ULTEGRA Di2 ST-R8170, 2x12-SPEED DCL |
| Cassette | SHIMANO ULTEGRA CS-R8100-12 11-34T |
| Chain | 12-SPEED CHAIN |
| Brakes | SHIMANO ULTEGRA HYDRAULIC DISC Type: Shimano Ultegra Hydraulic Disc |
| Brake Levers | SHIMANO ULTEGRA HYDRAULIC DISC |
| Rims | CARBON 622-19 24H FOR TYRE 622-28/62 DISC TUBELESS READY |
|---|---|
| Spokes | STAINLESS STRAIGHT PULL BUTTE |
| Front Hub | ALLOY THRU AXLE 12x100mm 24H SEALED BEARINGS CENTER LOCK |
| Rear Hub | ALLOY THRU AXLE 12x142mm 24H SEALED BEARINGS CENTER LOCK |
| Tires | SCHWALBE ONE ADDIX TLE 700x28C |
| Disc Rotors | SHIMANO ULTEGRA HYDRAULIC DISC |
First added 28 June
Last updated 7 June