HELIOS A8
Polygon
Race
HELIOS A8 is a carbon race road bike (2024), by Polygon, from the Helios lineup. It is a strong match for riders who want a sporty road feel without a full race fit, with a setup that gives you a sporty riding position, and is best matched to paved roads. Its strongest points in the MatchBikes metrics are strong value-for-money versus many similar bikes, an aero-leaning setup that still keeps some versatility, and good fit flexibility for dialing in rider position. At the same time, relative to category specialists, the trade-off is a firmer ride feel than comfort-first options and more of a flat-to-rolling terrain bias than a climbing focus. Compare this bike on MatchBikes.com to similar race models.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | XXS | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.365 mm | 1.387 mm | 1.408 mm | 1.43 mm | 1.448 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 | 505 mm | 520.21 mm | 535.2 mm | 550.4 mm | 564.7 mm | 580.8 mm |
| Reach | 370 mm | 375 mm | 380 mm | 385 mm | 390 mm | 395 mm |
| Top Tube Length | 505.31 mm | 517.31 mm | 530.42 mm | 543.04 mm | 555.14 mm | 569.25 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 | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm |
| Wheelbase | 968 mm | 975 mm | 983 mm | 991 mm | 1000 mm | 1005 mm |
| Bottom Bracket Drop | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Standover Height | 715 mm | 739 mm | 763 mm | 780 mm | 802 mm | 824 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 |
| Rider Min Height | 151 cm | 154 cm | 162 cm | 168 cm | 174 cm | 179 cm |
| Rider Max Height | 161 cm | 164 cm | 170 cm | 176 cm | 182 cm | 187 cm |




























































