Connex 900 9 Speed Chain. A remarkable value in a 9 speed chain, the Connex 900 chain not only features the German company's renowned strength and reliability but also offers superb gear changing properties thanks to its high performance plates. The optimized geometry of the plates enables extremely rapid and virtually silent gear changes on all derailleur systems. The newly developed peripheral chamfering of the outer plate ensures optimum gear changing performance. Additionally, this chain includes the Connex Link which provides a simple, tool free means to connect or disconnect the chain.