1. Transmission Chains
Power tranny chains are categorized into six major groupings.
1.1 Regular Roller Chains. These chains are made for transmission chain general usage.
1.2 High Performance Chains. These chains possess higher tensile strength and greater fatigue strength.
1.3 Lube-Totally free Chains. These chains have longer use life than standard chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with particular corrosion resistance.
1.5 Specialized Chains, Type 1. For specific applications.
1.6 Specialty Chains, Type 2. For general designs.
Within these six groups, there are 
plenty of types of chains available