2021 Isaac Cycle Boson Disc 55
Build
700C/29 in × 25 mm
Insights
Somewhat aggressive stack and reach vs trend of endurance road bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 576.7mm |
| Reach | 398.9mm |
| Stack to Reach Ratio | 1.45:1 |
| Seat Tube Length, C-T | 526.2mm |
| Seat Tube Length, C-C | 509.6mm |
| Top Tube Length, Effective/Horizontal HT Top | 557.9mm |
| Top Tube Slope | 7.4deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 176.5mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 266mm |
| Chainstay Length | 406mm |
| Chainstay Length Horizontal | 399.9mm |
| Front-Center | 608mm |
| Front-Center Horizontal | 604mm |
| Wheelbase | 1003.9mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 366mm |
| Trail | 55.7mm mid/neutral |
| Mechanical Trail | 53.2mm |
| Wheel Flop | 15.6mm |
| Standover Height | 777.7mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 102mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 96mm |
Disc Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 25mm |
| Tire Outer Diameter | 672mm |
| Bike Length with Tires | 1675.9mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.isaac-cycle.com/en_US/p/bike-boson-disc--sram-force-etap-axs/54737/