Experience the perfect balance of performance, comfort, and design with the Isaac Boson. This endurance road bike is built for long rides over challenging terrain, from cobblestone roads to epic mountain passes. Thanks to its unique geometry, the Boson offers maximum stability and comfort, even during the toughest rides.
The Boson immediately catches the eye with its elegant finish and subtle design. A bike that not only performs but also radiates style.
The frame is constructed using Advanced Carbon Tech Dual 30, providing a tensile strength of 30 tons per cm². This makes the Boson ultra-light and stiff, ideal for competitive performance. At the same time, the frame effectively dampens vibrations and shocks from uneven road surfaces for a comfortable ride.
The Boson is equipped with the Isaac Full Integrated System (IFS). Thanks to the 1.5" straight head tube system, cables are fully internally routed through the new Isaac Airflow carbon handlebar with integrated stem. This results in a clean cockpit, improved aerodynamics, and a streamlined appearance.
| Product Name: | Isaac BOSON Carbon Road Bike - Shimano 105 Di2 | Fore Four RD - 2026 - sonic silver |
| Manufacturer: | Isaac |
| Item Code: | ISA788331 |
| activity: | Cycling |
| gender: | men |
| material: | Carbon |
| usage bikesport: | Road Bike, Endurance |
| chain: | Shimano CN-M7100 |
| cassette: | Shimano CS-R7101 |
| shifter: | Shimano 105 ST-R7170 |
| rear derailleur: | Shimano 105 RD-R7150 Di2 |
| front derailleur: | Shimano 105 FD-R7150 Di2 |
| bottom bracket: | Shimano SM-BB72-41B | PressFit 86.5x41 |
| chainring ratio: | 50-34 |
| crankset: | Shimano 105 FC-R7100 |
| brakes: | Shimano 105 BR-R7170 | Centerlock | 160mm/140mm |
| wheels: | Fore Four RD | Tubeless ready |
| seat post model: | Carbon | 25mm Setback |
| saddle: | Surface Powerbox | 244x148mm |
| bar tape: | Isaac Momentum |
| handle bar: | Airflow II | Carbon |
| fork: | Isaac Advanced Carbon Tech Dual 30 | Tapered (1-1/8" - 1.5") | 12x100mm |
| headset: | Token A-Box | IS52/28.6 | IS52/40 |
| frame: | Isaac BOSON Advanced Carbon Tech Dual 30 | 1150g | 12x142mm |
| Shifting System (Manufacturer): | Shimano |
| gear ratio: | 11-12-13-14-15-17-18-21-24-27-30-34 |
| Shifting Type: | Chain - Electronical |
| brake type: | Disc Brake |
| wheel size: | 28" (622mm) |
| seatpost: | Seatpost rigid |
| Rear Triangle: | Unsuspended |
| tires: | Goodyear Eagle | 700x30C |
| max tire width: | 32mm |
| brake actuation: | Hydraulic |
| Model year: | 2026 |
| Color: | Grey, Olive |
| fork construction: | Rigid Fork |
| cable routing: | fully integrated |
| Product Series: | Isaac - Boson |
| Number of Gears: | 2 x 12 |
| Frame Shape: | Diamond |
| GTINs: | 8718223023936, 8718223023943, 8718223023950, 8718223023967 |
| Manufacturer page: | https://www.isaac-cycle.com/en_US/# |