2026 2026 Polygon Helios A8 Di2 Polygon Base M
Build
700C/29 in × 28 mm
Insights
Very aggressive stack and reach vs trend of performance road bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 533mm |
| Reach | 400mm |
| Stack to Reach Ratio | 1.33:1 |
| Seat Tube Length, C-T | 499mm |
| Top Tube Length, Effective/Horizontal Center | 556mm |
| Top Tube Slope | 5.7deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 73.7deg |
| Head Tube Length | 130mm |
| Bottom Bracket Drop | 73mm |
| Bottom Bracket Height | 266mm |
| Chainstay Length | 410mm |
| Chainstay Length Horizontal | 403.5mm |
| Front-Center | 597mm |
| Front-Center Horizontal | 592.6mm |
| Wheelbase | 996mm |
| Fork Offset/Rake | 45.3mm |
| Trail | 59.4mm mid/neutral |
| Mechanical Trail | 56.6mm |
| Wheel Flop | 17mm |
| Standover Height | 761mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 88mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 96mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1674mm |
| Handlebar Width | 420mm |
| Stem Length | 110mm |
| Stem Angle | -7.5deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 168 cm to 176 cm |
Source:https://www.polygonbikes.com/helios-a8-di2/