The Shimano CS-S500 Alfine Cog features a revised tooth profile designed to eliminate chain skip and improve engagement. It is engineered specifically for Shimano's internal gear hub systems, providing a durable and quiet interface for urban and trekking riders.

These cogs are available in 18T or 20T configurations to help you fine-tune your gear ratio. For added protection and drivetrain cleanliness, versions are available with an integrated chain guard to prevent the chain from derailing outward.

Quick Facts

Feature	Specification
Compatibility	Shimano Alfine & Nexus Internal Hubs
Tooth Counts	18T or 20T
Design Tech	Anti-skip tooth profile
Options	With or without chain guard
Chain Compatibility	Single-speed (1/8") or 3/32" chains