SIDI Hyper Extension Block System 2025 R18B Unlimited positioning with a 360°

Unlimited positioning with a 360° adjustment option

Models must be equipped with BMW luggage carrier

Compatible with Crossfire 2

High power

it is corrosion-resistant and precisely engineered for a perfect fit

SIDI Hyper Extension Block System 2025 R18B Unlimited positioning with a 360°SPECS Fits Crossfire 3 SRS models Advanced hyperextension prevention technology Provides safety without limiting flexibility Comes with installation screws and attachments DESCRIPTION The Sidi Hyper Extension Block System is a vital replacement part for Crossfire 3 SRS boots, designed to prevent hyperextension of the ankle, instep, and posterior tendon during intense rides. Featuring a two piece construction, this system enhances protection without