Shimano Nexus 4 brake unit 

Experience reliable braking performance with the Shimano Nexus 4 Brake Unit, specifically designed for the SG-4R30. This unit is ideal for those seeking an efficient and user-friendly braking experience.

• Effective Braking Performance: With the roller brake BR-IM40, you get smooth and controlled stopping power.
• User-Friendly: The Nexus 4 gear system ensures easy operation and maintenance.
• Compatibility: Specifically designed for the SG-4R30, ensuring a perfect fit and function.

Shimano is known for their quality and innovation, and this brake unit is no exception. Perfect for cyclists who want a reliable and hassle-free braking experience.