Description |

The Shimano Alfine Double Pulley Chain Tensioner CT-S500 is designed for Shimano Alfine equipped bicycles that need reliable chain management with an internal gear hub setup. It uses a double pulley design to help maintain proper chain tension and is intended for builds where chain growth or drivetrain setup requires a tensioner.

Shimano states that the CT-S500 can accommodate a front chainring difference of 16 teeth and works with sprocket sizes from 18 to 20 teeth. It is a practical solution for Alfine bikes that need clean, dependable chain control.

Features |

Double pulley chain tensioner for Shimano Alfine bikes
Designed to maintain proper chain tension on compatible internal gear hub setups
Accommodates a front chainring difference of 16 teeth
Compatible with 18 to 20 tooth sprockets
Available in silver or black
Replacement pulley set listed as RD 5701

Specs |

Model	Alfine Double Pulley Chain Tensioner CT-S500
Brand	Shimano
Type	Double pulley chain tensioner
Drivetrain Compatibility	Shimano Alfine equipped bicycles
Front Chainring Difference Capacity	16 teeth
Compatible Sprocket Sizes	18 to 20 teeth
Replacement Parts	Pulley set RD 5701
Use	Chain tension management for internal gear hub bicycles

Drivetrain Accessories

ALFINE Chain Tensioner