Skip to content

Free 30-Day Bike Return

AUS AUS ▾
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Polygon Helios A7X - 105 Di2 Carbon Road Bike
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt
media.alt

Description

PERFORMANCE AERO

The Polygon Helios A7X is a UCI-approved carbon aero race bike weighing just 8.1kg, this machine is engineered for speed and performance. Whether you’re an aspiring racer chasing the podium or seeking an aerodynamic lightweight ride, the Helios A7X delivers the speed and agility you need to beat PRs and the competition.

LOOKS FAST, FEELS FASTER

The Helios A7X ACX carbon frame, weighing a mere 800g, is meticulously designed for aerodynamic efficiency, boasting a 31% reduction in drag over the previous generation. Wider clearance for 28c tyres enhances comfort without sacrificing speed, while reinforcements in the bottom bracket, chainstay, and thru-axles ensure that every watt of your effort translates into pure speed on the road.

A TRUSTED BRAND

Polygon boasts over 30 years of experience and is known for offering high-performance bikes at competitive prices. Polygon road bikes have led to numerous national titles and even a victory at the 2023 Tour De Taiwan. With a 5-year warranty, you can trust Polygon to deliver from the factory to the track.

INDUSTRY REVIEWS

Incredible value, well-mannered ride, quick yet balanced handling, Shimano 105 Di2 group, did I mention the incredible value?” - Escape Collective

SHIMANO 105 Di2 GROUPSET

Lightning-fast electronic gear changes, a wider 2x12 drivetrain with 11-34T cassette, and versatile 52/36T chainrings make conquering any terrain a breeze. Enjoy pro-level performance at an accessible price.

CARBON WHEELS

Suited to undulating terrain, the Entity WR5 50mm carbon wheels offer a fast yet comfortable riding experience and come wrapped in Schwalbe ONE 28mm TLE/race-ready tyres.

INTEGRATED

The fully integrated BLKTEC R8 cockpit strikes the perfect balance between simplicity and aero engineering. It features a removable cover, making maintenance a breeze.

Components

FRAMESET
FRAME
ACX Performance UCI Approved, Internal Cable Routing, Shimano BB-RS500 Press Fit Bottom Bracket, 12x142mm Thru-Axle, Flat Mount Disc
SUSPENSION
FORK
ACX Performance UCI Approved, 12x100mm Thru-Axle, Flat Mount Disc
DRIVETRAIN
REAR DERAILLEUR
Shimano 105 Di2 RD-R7150, 12-Speed
FRONT DERAILLEUR
Shimano 105 Di2 RD-R7150, Braze-On
SHIFTER
Shimano 105 Di2 ST-R7170, 12-Speed
CRANK
Shimano 105 FC-7100, HollowTech 2, 12-Speed, XXS-M:170mm, L-XL:172.5mm
CHAINRING
50/34T or 52/36T *
CASSETTE
Shimano 105 CS-R7100, 12-Speed, 11-34T
CHAIN
KMC X12, 12-Speed
BRAKES
FRONT BRAKE
Shimano 105 BR-R7170, Hydraulic Disc, 160mm Center Lock
REAR BRAKE
Shimano 105 BR-R7170, Hydraulic Disc, 140mm Center Lock
WHEELS
REAR HUB
Entity WR5 Carbon Disc, 900g, 21mm Internal Width, 50mm Depth, Novatec D792SB-X12 Hub, 24H, Stainless Straight Pull Butte Spokes, Tubeless Tape Installed
TYRE
Schwalbe One Addix TLE, 700x28C
INNER TUBE
80mm Presta Valve
CONTACT POINTS
HANDLEBAR
BLKTEC R8 Integrated, 400mm Width (XXS-S), 420mm Width (M-XL)
SADDLE
Entity Flux2
SEATPOST
Polygon Carbon Aero Seatpost, 35x306mm (XXS), 337mm (XS), 357mm (S-XL), 20mm Adjustable Offset
STEM
BLKTR8 Integrated, 100mm Length (XXS-S), 110mm Length (M-L), 120mm Length (XL), 0-Degree
PEDALS
Not Included
WEIGHT
BIKE WEIGHT
8.1kg (Size L)

* We cannot guarantee which option will be included with your purchase.

Geometry

Size XXS XS S M L XL
Height (cm) 158-164cm 163-168cm 166-174cm 172-180cm 178-186cm 184-192cm
Crank Length 170 170 170 170 172.5 172.5
Handlebar Width 400 400 400 420 420 440
Stem Length 90 90 90 100 100 110
Seat Tube Length (A) 450 475  500  520 545  570 
Seat Tube Angle (B) 75° 74.7° 74.3° 74° 73.7° 73.3° 
Effective Seat Tube Angle (C) 75°  74.7°  74.3° 74° 73.7°  73.3° 
Head Tube Length (D) 100  115  130  145  160  175 
Head Tube Angle (E) 71.5°  71.8°  72°  72.3°  72.3°  72.8° 
Effective Top Tube (F) 505.31 517.31 530.42 543.04 555.14 569.25
BB Height (G) 271  271 271  271 271 271 
BB Offset (H) 73 73  73  73 73 73
Chainstay Length (I) 415 415 415  415 415  415
Wheelbase (J) 968.42  975.82 983.9 991.1  1000.62  1005.8 
Frame Reach (K) 370 375 380  385  390 395
Frame Stack (L) 505 520.21 535.2 550.4 564.7 580.8 
Standover Height (M) 716.04 739.4 763.21 780.8  802.52 824.28 


*All lengths in mm

Assembly

Your bike needs minor assembly before riding; use the tools and videos included.

As a guide, it'll take 10-40min depending on whether you're an experienced bike assembler or have little to no mechanical experience.

Side Note: Your cables will stretch during the initial bed-in period and must be adjusted by an experienced mechanic around 150km of riding.

Step 1

Unboxing Your Bike

Step 2

Bike Fit Setup

Step 3

Tyre Pressure Setup

Compare this bike

Polygon Premier 24 XC Disc Evo - Kids Mountain Bike
Premier Jr 24 XC Disc Evo
$649.99
  • Description
    The Polygon Premier 24” XC EVO Disc features a lightweight aluminium frame, Suntour XCT Suspension, Microshift Advent 1x9-Speed wide range groupset, Tektro Jr. hydraulic disc brakes and VeeTire Co. Crown Gem tyres
  • FRAMESET
    frame
    ALX Junior 24” Aluminium Frame, Quick Release 9x100mm, Threaded 73mm BB
    headset
    N/A
  • SUSPENSION
    fork
    Suntour XCT JR, Extra Soft Coil, 80mm Travel
    shock
    N/A
  • DRIVETRAIN
    rear derailleur
    MicroShift ADVENT RD-M6195, 9-Speed
    front derailleur
    N/A
    shifter
    MicroShift SL-M6195R, 9-Speed Shifter
    crank
    ProWheel C10Y, 140mm
    chainring
    30T
    cassette
    MicroShift CS-H093, 11-38T
    chain
    KMC X9, 9-Speed
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Helios A7X - 105 Di2 Carbon Road Bike
Helios A7X
$4,199.99
  • Description
    The A7X comes equipped with the latest Shimano 105 Di2 hydro disc groupset, aerodynamic 50mm carbon TL wheels, an integrated cockpit and a lightweight UCI-approved carbon frame with a stunning paint job, all weighing in at 8.1kg.
  • FRAMESET
    frame
    ACX Performance UCI Approved, Internal Cable Routing, Shimano BB-RS500 Press Fit Bottom Bracket, 12x142mm Thru-Axle, Flat Mount Disc
    headset
    N/A
  • SUSPENSION
    fork
    ACX Performance UCI Approved, 12x100mm Thru-Axle, Flat Mount Disc
    shock
    N/A
  • DRIVETRAIN
    rear derailleur
    Shimano 105 Di2 RD-R7150, 12-Speed
    front derailleur
    Shimano 105 Di2 RD-R7150, Braze-On
    shifter
    Shimano 105 Di2 ST-R7170, 12-Speed
    crank
    Shimano 105 FC-7100, HollowTech 2, 12-Speed, XXS-M:170mm, L-XL:172.5mm
    chainring
    50/34T or 52/36T *
    cassette
    Shimano 105 CS-R7100, 12-Speed, 11-34T
    chain
    KMC X12, 12-Speed
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Polygon Siskiu D24 EVO - Kids Mountain Bike
Siskiu Jr D24 EVO
$1,799.99
  • Description
    The Polygon Siskiu D24 EVO is the perfect full-suspension mountain bike for young riders ready to conquer the trails. With its lightweight frame, adjustable air suspension, dropper post, and reliable components, it's built for fun and progression.
  • FRAMESET
    frame
    ALX XC Trail Kids 6061 Aluminum Frame, 120mm Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded BB, ISCG05 Chain Guide, 142x12mm Thru-Axle
    headset
    N/A
  • SUSPENSION
    fork
    X-Fusion Velvet, 120mm, Air Fork, Preload adjuster
    shock
    X-Fusion 02 PRO R, 190x45mm
  • DRIVETRAIN
    rear derailleur
    Shimano Cues RD-U6000, 10-Speed
    front derailleur
    N/A
    shifter
    Shimano Cues SL-U600 , 1x10-speed
    crank
    Prowheel C10Y-NW, 30T, 140mm
    chainring
    N/A
    cassette
    Shimano Cues CS-LG300 11-48t
    chain
    Shimano LG500
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Siskiu D24 - Kids Mountain Bike
Siskiu Jr D24
$1,399.99
  • Description
    The Polygon Siskiu D24 is the perfect full-suspension mountain bike for young riders ready to conquer the trails. Upgraded for 2024 with hydraulic disc brakes, this bike also boasts a lightweight frame, adjustable air suspension, and reliable components - it's built for fun and progression.
  • FRAMESET
    frame
    ALX XC Trail Kids 6061 Aluminum Frame, 120mm Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded BB, ISCG05 Chain Guide, 142x12mm Thru-Axle
    headset
    N/A
  • SUSPENSION
    fork
    Suntour Raidon 32, Air Spring, 120mm Travel, Rebound, Lockout, Q-LOC2 Axle 15x100mm
    shock
    Suntour Raindon R, Air Spring, Rebound, Custom Tune
  • DRIVETRAIN
    rear derailleur
    Microshift Acolyte RD-M5185M, Medium Cage, Clutch
    front derailleur
    N/A
    shifter
    Microshift Acolyte Trigger SL-M7180M, 1x8-speed
    crank
    Prowheel C10Y-NW, 30T, 140mm
    chainring
    N/A
    cassette
    Microshift Acolyte CS-H083, 8-speed, 12-42T
    chain
    KMC Z8
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Polygon Siskiu D5 - Mountain Bike
Siskiu D5
$1,299.99
  • Description
    The Polygon Siskiu D5 combines a lightweight, premium-quality aluminium frame with reliable Shimano and Suntour parts to provide a value-for-money package with everything you need to ride more for less.
  • FRAMESET
    frame
    ALX XC Trail 6061 Aluminium Frame, One Piece Linkage Suspension Platform 120mm Travel, Dropper Post And Rear Derailleur Routing, Direct Post-Mount Disc Brake, 141mm BOOST QR , 73mm Threaded BB
    headset
    N/A
  • SUSPENSION
    fork
    SR Suntour XCM HLO, 120mm Travel, Preload Adjuster, Hydraulic Lockout
    shock
    SR Suntour Raidon- LO AIR, E2E: 190X51mm, Hardware: M8x22mm
  • DRIVETRAIN
    rear derailleur
    Shimano Alivio RD-M3100 - Direct Mount
    front derailleur
    Shimano Alivio FD-M3120-E
    shifter
    Shimano Alivio SL-M3100 - 18sp
    crank
    Shimano Altus FC-MT2102 36x24T Boost, 170mm
    chainring
    N/A
    cassette
    Shimano CS-HG200 9-Speed, 11-36T
    chain
    KMC X9
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Marin Alcatraz 2 - Dirt Jump Bike
Alcatraz 2
$1,499.99
  • Description
    Co-designed with MTB pro Matt Jones, the Alcatraz is built for all things dirt. Its Series 3 aluminium frame is tough, stiff, and agile. Features include a 100mm Manitou fork, Shimano hydraulic brakes, and Vee Tires. Available in regular and long sizes.
  • FRAMESET
    frame
    Series 3 6061 Aluminium, 26” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs
    headset
    FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”
  • SUSPENSION
    fork
    Manitou Circus Expert, 26", 100mm Travel, Coil Spring, Taper Steerer Tube, 20x110mm Thru Axle
    shock
    N/A
  • DRIVETRAIN
    rear derailleur
    N/A
    front derailleur
    N/A
    shifter
    N/A
    crank
    Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD
    chainring
    N/A
    cassette
    14T Single Speed Cog
    chain
    KMC HL-1
  • E-SYSTEM
  • BRAKES
  • WHEELS
  • CONTACT POINTS
  • WEIGHT
  • ACCESSORIES
Shop Now
Customer Reviews
4.9 Based on 14 Reviews
5 ★
93% 
13
4 ★
7% 
1
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
Customer Photos
Polygon Helios A7X - 105 Di2 Carbon Road Bike - Customer Photo From Gordon Fagani
2024 Polygon Helios A7X - Customer Photo From Ash Abdoui
2024 Polygon Helios A7X - Customer Photo From Ash Abdoui
2024 Polygon Helios A7X - Customer Photo From Ash Abdoui
2024 Polygon Helios A7X - Customer Photo From Ash Abdoui
2023 Polygon Helios A7X - Shimano 105 Di2 Carbon Aero Road Bike - Customer Photo From Everton Campbelli
2023 Polygon Helios A7X - Shimano 105 Di2 Carbon Aero Road Bike - Customer Photo From Everton Campbelli
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
HB
05/10/2025
Harold B.
Australia Australia

Great Service

With Brad's help and multiple phone calls the right size bike was established including follow up emails. the personal attention was very much appreciated

Polygon Helios A7X - 105 Di2 Carbon Road Bike
Share   |   Facebook  •  Twitter
Was this helpful?  0    0
A BikesOnline Australia Customer
BF
04/24/2025
Brendan F.
Australia Australia

Very Happy Customer

After searching for a second hand bike within limited budget for months, I gave in a went with a brand new option. This bike is such good value and the best option for people who need a decent road bike but are still fairly new to the sport.

Polygon Helios A7X - 105 Di2 Carbon Road Bike
Share   |   Facebook  •  Twitter
Was this helpful?  0    0
RR
04/23/2025
Rommel R.
United States United States

High tech bike , on a descent price

Bike came on time , well secured. bike is awesone , love the paint job, carbon frame , fork , wheels , handle bar. I did two rides for 130 miles. Bike still strong . Electronic shifting work really well. Some of my co riders already interested . I will recommend .👍

Polygon Helios A7X - 105 Di2 Carbon Road Bike
Share   |   Facebook  •  Twitter
Was this helpful?  0    0
A
04/07/2025
Adam
Australia Australia

This is the bike you are looking for

My first purchase of a bike online and it has been so easy and no stress. Fast shipping. Now the bike. I have put over 700km on it already and absolutely love it. Full carbon frame, Shimano 105 DI2 gears and the aero bars at the front. Clean looking bike and a great colour too. This bike stacks up to the same level of its equivalent of the major brands such as Trek and Giant. And at the price point, you actually have to pay a little more to get something like for like to the major brands.

Polygon Helios A7X - 105 Di2 Carbon Road Bike
Share   |   Facebook  •  Twitter
Was this helpful?  0    0