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Today’s Deals2025 Polygon
HELIOS A8
A carbon frame race bike with high-end components and shimano ultegra hydraulic disc brakes.
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Manufacturer Price
$3,299| Frame | Carbon |
|---|---|
| Fork | Carbon |
| Wheels | 700c Carbon |
| Drivetrain | 2 × 11 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 Comparison4'11" – 5'4"
5'0" – 5'5"
5'3" – 5'7"
5'6" – 5'10"
5'8" – 6'0"
5'10" – 6'2"
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 Hanger Standard: UDH Tire Clearance: 34c Color: Nubium Grey |
|---|---|
| Fork | ACX PERFORMANCE UCI APPROVED, TAPER 1-1/8" TO 1-1/2" |
| Bottom Bracket | SHIMANO BB-RS500-PB, PRESSFIT BB86 |
| Headset | INTEGRATED (IS) SEALED BEARING FOR OS HEAD TUBE, IS 52/28.6 | IS 52/40 |
| Stem | Polygon Carbon Stem: Length – 90mm (XXXS), 100mm (XXS–XS), 110mm (S–M), 120mm (L–XL); Angle – -7.5° |
| Handlebar | FSA ENERGY COMPACT, W: 400mm (XS, S) / 420mm (M, L) / 440mm (XL), BB: 31.8mm, R/D: 123.2mm, B/R: 78mm |
| Saddle | ENTITY FLUX2, CR-MO ø 7mm |
| Seatpost | CARBON, AERO 35 x 337mm (XS) / 357mm (S, M, L, XL) Type: Rigid |
| Pedals | - |
| Grips | Performance Road Bar Tape (Black) |
| Rear Derailleur | SHIMANO ULTEGRA RD-R8000-GS |
|---|---|
| Front Derailleur | Shimano Ultegra Di2 FD-R8150, Braze-On, Down-Pull |
| Crank | SHIMANO ULTEGRA FC-R8000 52/36T, CRANK ARM: 170mm (XS, S, M) / 172.5mm (L, XL) |
| Shifters | SHIMANO ULTEGRA ST-R8020, 2x11-SPEED DCL |
| Cassette | SHIMANO ULTEGRA CS-R8000-11 11-34T |
| Chain | SHIMANO CN-HG601-11 |
| Brakes | SHIMANO ULTEGRA BR-R8070 FLAT Type: Shimano Ultegra Hydraulic Disc |
| Brake Levers | SHIMANO ULTEGRA ST-R8020 |
| Rims | CARBON 622-19 24H FOR TYRE 622-28/62 DISC TUBELESS READY |
|---|---|
| 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 SM-RT70 F:160mm / R:140mm CENTER LOCK |
First added June 28
Last updated June 1