Helios A9X
Polygon
Race
Helios A9X is a carbon race road bike (2024), by Polygon, from the Helios lineup. This setup will suit riders who want a sporty road feel without a full race fit, leaning toward a sporty riding position, and is best matched to paved roads. Metric-wise, it stands out for strong value-for-money versus many similar bikes, a clearly aero-focused setup for faster road riding, and strong speed potential on smoother terrain. That said, what it gives up slightly is a firmer ride feel than comfort-first options and a more specific fit setup that may suit fewer riders. Use MatchBikes.com to compare this bike with nearby race options.
7.0
Rating

+2
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Score Summary
Performance
7.3
Value
9.9
Fit
4.3
Performance
Built for speed and efficiency
Speed
8.3
Very High
Climbing Efficiency
7.4
Climber
Aerodynamics
9.0
Full Aero
Fit
Dialed-in Fit & Comfort
Riding Position
6.6
Sporty
Fit Flexibility
2.0
Race-Fit Specific
Ride Comfort
3.1
Firm
Value
Value for Money
9.9
Exceptional Value
Surface Range
Road OnlySpecifications
General
Brand
Polygon
Model
Helios A9X
Year
2024
Price
$5,049
Weight
7.7 kg
Category
Road
Sub Category
Race
Groupset
Dura-Ace Di2
Wheels
700c
Frame
Frame
ACX Performance UCI Approved, Internal Cable Routing, Shimano KSMBB9241B Press Fit Bottom Bracket, 12x142mm Thru-Axle, Flat Mount Disc
Suspension Fork
ACX Performance UCI Approved, 12x100mm Thru-Axle, Flat Mount Disc
Suspension Type
Rigid
Drivetrain
Shift Levers
Shimano Dura-Ace Di2 ST-R9270, 12-Speed
Rear Derailleur
Shimano Dura-Ace Di2 RD-R9250, 12-Speed
Front Derailleur
Shimano Dura-Ace Di2 FD-R9250, Braze-On
Cassette
Shimano Dura-Ace CS-R9250, 12-Speed, 11-34T
Crank
Shimano Dura-Ace FC-9200, HollowTech 2, 12-Speed, XS-M:170mm, L-XL:172.5mm, W/ Dura-Ace FC-R9200-P Power Meter (Optional)
Bottom Bracket
BB86/BB92, press-fit
Chain
Shimano CN-M8100, 12-Speed
Wheels
Rims
Front: Shimano C60 Dura-Ace Carbon Disc, 751g, 21mm Internal Width, 60mm Depth, 24H, Tubeless Tape Installed, Rear: Shimano C60 Dura-Ace Carbon Disc, 858g, 21mm Internal Width, 60mm Depth, 24H, Tubeless Tape Installed
Tires
Front: Schwalbe One Addix TLE, 700x28C, Rear: Schwalbe One Addix TLE, 700x28C
Brakes
Brake Type
Hydraulic Disc
Brake Description
Front: Shimano Dura-Ace BR-R9270, Hydraulic Disc, 160mm Center Lock, Rear: Shimano Dura-Ace BR-R9270, Hydraulic Disc, 160mm Center Lock
Cockpit
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, 400mm Width (XS-S), 420mm Width (M-L), 420mm (XL), 80mm Reach, 125mm Drop
Seat
Saddle
Entity Flux2
Seatpost
Polygon Carbon Aero Seatpost, 35x337mm (XS), 357mm (S-XL), 20mm Adjustable Offset
Geometry
| Measurement | XXS | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.37 mm | 1.39 mm | 1.41 mm | 1.43 mm | 1.45 mm | 1.47 mm |
| Bottom Bracket Height | 271 mm | 271 mm | 271 mm | 271 mm | 271 mm | 271 mm |
| Front Center | 565 mm | 572 mm | 580 mm | 587 mm | 597 mm | 602 mm |
| Rake | 43 mm | 43 mm | 43 mm | 43 mm | 43 mm | 43 mm |
| Trail | 67 mm | 65 mm | 64 mm | 62 mm | 62 mm | 59 mm |
| Stack | 504 mm | 519.21 mm | 534.2 mm | 549.4 mm | 563.7 mm | 579.8 mm |
| Reach | 369 mm | 374 mm | 379 mm | 384 mm | 389 mm | 394 mm |
| Top Tube Length | 504.31 mm | 516.31 mm | 529.42 mm | 542.04 mm | 554.14 mm | 568.25 mm |
| Seat Tube Angle | 75 ° | 74.7 ° | 74.3 ° | 74 ° | 73.7 ° | 73.3 ° |
| Seat Tube Length | 450 mm | 475 mm | 500 mm | 520 mm | 545 mm | 570 mm |
| Head Tube Angle | 71.5 ° | 71.8 ° | 72 ° | 72.3 ° | 72.3 ° | 72.8 ° |
| Head Tube Length | 100 mm | 115 mm | 130 mm | 145 mm | 160 mm | 175 mm |
| Chainstay Length | 414 mm | 414 mm | 414 mm | 414 mm | 414 mm | 414 mm |
| Wheelbase | 967 mm | 974 mm | 982 mm | 990 mm | 999 mm | 1004 mm |
| Bottom Bracket Drop | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Standover Height | 715 mm | 738 mm | 762 mm | 779 mm | 801 mm | 823 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 |




























































