2021 Isaac Cycle Boson Disc 58
Build
700C/29 in × 25 mm
Insights
Somewhat aggressive stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Isaac Cycle Boson
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 590.5mm |
| Reach | 402.1mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, C-T | 539mm |
| Seat Tube Length, C-C | 522.7mm |
| Top Tube Length, Effective/Horizontal HT Top | 570mm |
| Top Tube Slope | 7.6deg |
| Head Tube Angle | 73.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 189mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 266mm |
| Chainstay Length | 406mm |
| Chainstay Length Horizontal | 399.9mm |
| Front-Center | 607.3mm |
| Front-Center Horizontal | 603.3mm |
| Wheelbase | 1003.2mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 366mm |
| Trail | 52.6mm mid/neutral |
| Mechanical Trail | 50.4mm |
| Wheel Flop | 14.3mm |
| Standover Height | 789mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 101.3mm |
| 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 | 1675.2mm |
| 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/