This rear derailleur is designed for 9-speed systems. It's compatible with 8-speed setups, offering flexibility in your cycling needs. The long cage design ensures smooth operation across various gear transitions. 🚴♂️

• Perfect for upgrading your current 8-speed system.

Technical Note:

2 is to 1 Shimano ratio: This detail suggests a specific ratio relationship, though further context is needed for complete understanding. Keep this in mind when planning your upgrade.