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The Shimano SG-3C40 Nexus 23T Sprocket is a reliable replacement or upgrade part designed for Shimano Alfine and Nexus internal gear hubs.

It also works with 3-tabbed coaster brakes, offering versatile compatibility for a wide range of bicycle setups.

This cog works seamlessly with either 1/8 inch or 3/32 inch chains, making it adaptable to different drivetrain configurations.
Built to Shimano's high standards, it delivers smooth shifting and dependable performance in daily commuting or recreational riding.

The 23-tooth configuration provides a balanced gear ratio suitable for various riding styles and terrain.
Whether maintaining an existing Nexus system or building a custom wheel, this sprocket ensures consistent power transfer and durability.
Shimano parts like the SG-3C40 are known for their precision engineering and long service life.

Easy to install on compatible hubs, it helps keep your bike running smoothly mile after mile.
A practical choice for cyclists who value quality components and hassle-free maintenance.
4.5 out of 5