Equip your bike with this Bell Sports Bicycle Chain 7015886. It s designed to fit most gearing systems and is compatible with road hybrid and mountain bikes. You can use this heavy-duty bicycle chain on 10- to 21-speed bikes with 5- to 7-speed rear derailleur systems. It includes 112 links and one master link for an easy installation without the need for tools. A tool may be required to shorten the chain or remove an old chain.