Custom steel frame designed for SRAM wireless groupsets, featuring internal rear hydraulic brake routing and a handcrafted T47 stainless steel bottom bracket shell. Built with Columbus Spirit and Life tubing using Silver Fillet Brazed technique.
Custom steel frame "Forgione Polaris" built with Columbus SPIRIT & LIFE tubing, designed for SRAM wireless groupsets and handcrafted using low-temperature Silver Fillet Brazed technique.
This project was conceived for SRAM wireless electronic groupsets and features internal routing for the rear hydraulic brake hose. To ensure proper hose routing, reduce localized stress, and improve serviceability, Vincenzo Forgione designed and handcrafted a T47 stainless steel bottom bracket shell, produced entirely in his workshop.
The T47 standard combines the torsional stiffness of an oversized threaded bottom bracket with the precision and long-term reliability of steel, making it a technically coherent solution for a high-end custom steel frame.
The frame structure is built using a carefully selected combination of Columbus SPIRIT and LIFE tubing, butt-matched according to the expected loads in each section of the frame. Joining is performed using low-temperature Silver Fillet Brazed technique, which preserves the mechanical properties of the tubing, limits thermal distortion, and ensures structural continuity with refined finishes.
From a riding perspective, the result is a frame offering an optimized balance between stiffness, vibration damping, and handling precision, while retaining the distinctive ride quality of high-grade steel.
The custom paint finish, developed according to the client’s design and specifications, completes the project, making the Forgione Polaris a fully unique frame, both in geometry and aesthetics.
| Custom steel frame | Columbus SPIRIT & LIFE tubing |
| Joining technique | Low-temperature Silver Fillet Brazed |
| Bottom Bracket Shell | T47 stainless steel, custom-designed and handcrafted |
| Groupset compatibility | SRAM wireless |
| Braking system | Disc brakes with internal rear hydraulic hose routing |
| Cable routing | Internal (hydraulic line) |
| Paint finish | Fully custom, client-specific design |
Every Forgione Polaris frame is the result of a fully custom design process: geometry, materials, construction details, and finishes are defined case by case. There are no standard sizes or predefined configurations.
The Forgione Polaris is designed for riders seeking a technically advanced solution beyond industrial production. A project that combines engineering awareness, manual craftsmanship, and deep knowledge of steel, following Vincenzo Forgione’s approach.You can purchase the "Forgione Polaris" frame directly online from this page, choosing the Frame + Fork option or a fully customized configuration. After purchase, Vincenzo Forgione will contact you to define geometry, technical specifications, finishes, and delivery or shipping details.
Further technical and aesthetic customizations are always possible. You may also supply your own components and receive the complete bicycle, fully assembled and ready to ride.