SIDI · Boot Parts
The SIDI Hyper Extension Block System is a replacement boot part built to help limit ankle and foot overextension on compatible SIDI boots. Designed for the SIDI Crossfire 3, this component is intended to maintain the boot’s hyperextension-blocking function by targeting overextension of the ankle, instep, and posterior tendon.
With a two-piece construction intended to add protection without compromising flexibility, this system is made to be easy to install so the boot can be kept up to date with its original protective design.
This Hyper Extension Block System is designed to limit overextension of the ankle and foot. SIDI describes it as helping prevent hyperextension of the ankle, instep, and posterior tendon during intense rides, supporting the boot’s protective intent where overextension control is needed.
Built with a two-piece design, this replacement block system is intended to enhance protection without sacrificing flexibility. It’s made to keep the boot moving as designed while maintaining the function of the hyperextension block system integrated into the boot’s structure.
This replacement part fits the SIDI Crossfire 3 boot, as listed by SIDI. It comes with installation screws and attachments, supporting straightforward replacement when servicing worn or damaged hyperextension block components on a compatible boot.
| Part Number | 2438-0057-00 |
|---|---|
| SIDI Reference | 155 |
| SIDI Crossfire 3 |
Fitment as listed by SIDI for this part.
| Advanced hyperextension prevention technology. |
| Provides safety without limiting flexibility. |
| Comes with installation screws and attachments. |
As listed by SIDI for this boot part.
