2026 Polygon Helios A8X Base M
Build
700C/29 in × 28 mm
Insights
Average stack and reach vs trend of performance road bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 550.4mm |
| Reach | 385mm |
| Stack to Reach Ratio | 1.43:1 |
| Seat Tube Length, C-T | 520mm |
| Top Tube Length, Effective/Horizontal Center | 543mm |
| Top Tube Slope | 5.5deg |
| Head Tube Angle | 72.3deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 145mm |
| Bottom Bracket Drop | 68mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 415mm |
| Chainstay Length Horizontal | 409.4mm |
| Front-Center | 585.7mm |
| Front-Center Horizontal | 581.7mm |
| Wheelbase | 991.1mm |
| Fork Offset/Rake | 40.7mm |
| Trail | 65.4mm high |
| Mechanical Trail | 62.3mm |
| Wheel Flop | 19mm |
| Standover Height | 780.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 76.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1669.1mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Published Sizing Recommendations
| Height | 5 ft 9 in to |
Source:https://bikesonline.com/products/2024-polygon-helios-a8x