Bossi Grit SS gravel bike frameset

The Bossi Grit SS gravel bike frameset is engineered for riders who demand cutting-edge construction, exceptional durability, and true all-terrain versatility. Designed by Bossi, the Grit SS represents a modern approach to gravel performance, combining advanced manufacturing techniques with practical, ride-focused design.

At the heart of the Grit SS is a highly sophisticated chassis built using a combination of die-cast headtubes, 3D-printed yokes, and 3D-printed dropouts. This innovative construction method allows for precise control of frame structure, delivering optimal stiffness, strength, and weight efficiency. Complementing this is the use of hydroformed tube profiles, enhancing ride quality while maintaining exceptional responsiveness and durability across demanding surfaces.

Designed with real-world gravel riding in mind, the frameset offers generous clearance for 700 × 50mm tyres, providing the versatility to tackle everything from fast mixed-surface riding to rough, technical terrain. The inclusion of a UDH (Universal Derailleur Hanger) ensures drivetrain compatibility, improved serviceability, and future-proof performance.

Practicality is central to the Grit SS design. Multiple frame mounting locations allow riders to configure the bike for endurance rides, bikepacking, or adventure-focused setups. Clean aesthetics and enhanced protection are achieved through integrated cable routing, delivering a sleek, modern appearance while safeguarding cables from dirt and debris.

Built to withstand decades of riding, the Bossi Grit SS frameset is backed by an impressive 50-year warranty, reflecting the confidence placed in its advanced construction and long-term durability.

The Bossi Grit SS gravel frameset is more than just a platform — it is a statement of modern frame engineering, designed for cyclists seeking performance, reliability, and versatility without compromise.

Frame features

- Aero die-cast 6AL/4V head tube
- Hydroformed 3AL/2.5V aero down tube
- Hydroformed 3AL/2.5V top tube with bag mounts
- Ovalised and tapered 3AL/2.5V chainstays
- Tapered 3AL/2.5V seatstays with rack mounts
- 3D Printed 6AL/4V size specific dropouts
- 3D printed 6AL/4V chain stay yoke
- CNC 6AL/4V 86mm T47 bottom bracket
- Fully integrated cable routing
- 3x bidon mounts
- Triple fork rack mounts
- 12mm thru axle (12x100mm front, 12x142mm rear)

- Flat mount disc brake
- SRAM UDH (supplied with direct mount hanger option)
- 27.2mm seat post
- Seatstay bridge
- Chainstay bridge
- Full fender mounts
- Chain holder on seatstay
- CNC headtube logo
- Laser engraved downtube logos
- Brush finish
- 700x50c tyre clearance, 27.5” x 2.2”
- Electronic groupset optimised, mechanic compatible