2021 Isaac Cycle Boson Disc 49
Build
700C/29 in × 25 mm
Insights
Average 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 | 538.5mm |
| Reach | 368mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 454.8mm |
| Seat Tube Length, C-C | 438mm |
| Top Tube Length, Effective/Horizontal HT Top | 505.9mm |
| Top Tube Slope | 11.5deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 75deg |
| Head Tube Length | 144mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 266mm |
| Chainstay Length | 406mm |
| Chainstay Length Horizontal | 399.9mm |
| Front-Center | 581.4mm |
| Front-Center Horizontal | 577.2mm |
| Wheelbase | 977.1mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 366mm |
| Trail | 68.1mm high |
| Mechanical Trail | 64.4mm |
| Wheel Flop | 21mm |
| Standover Height | 711mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 75.4mm |
| 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 | 1649.1mm |
| 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/