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2024 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
FrameCarbon
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 11 Electronic
GroupsetUltegra, Ultegra Di2
BrakesShimano Ultegra Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
HELIOS A8
Other Race bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

41 mph

HELIOS A8

40 mph

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Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full HELIOS model range

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Sizing
XXS

4'11" – 5'4"

XS

5'0" – 5'5"

SM

5'3" – 5'7"

MD

5'6" – 5'10"

LG

5'8" – 6'0"

XL

5'10" – 6'2"

Rider Fit Notes
  • 6'1", size XL, Just right
View details
Reviews
Velo
First Ride: The Polygon Helios A Refines the Attainably-Priced Aero Road Bike Formula

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.

Read Review

Escape Collective
2024 Polygon Helios A7X road bike review: Aero on a budget - Escape Collective

Oct 2023 · Dave Rome

An incredibly well-priced performance-orientated aero road bike sold directly to consumers.

Highs

  • Incredible value

  • Well-mannered ride

  • Quick yet balanced handling

  • Shimano 105 Di2 group

  • Did I mention the incredible value?

Lows

  • Long reach isn’t for all

  • Adjusting stem height is tricky

  • Bars are real wide for an aero bike

  • No affordable option to change the handlebar

  • Tight tyre fit on rims

  • Out-of-box build could use a mechanic

  • Bartape.

Read Review

Geometry
Specs
Build
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)

Groupset
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

Wheels
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

Rider Notes
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First added July 17

Last updated August 23

Not listed for 282 days