1. Transmission Chains
Power transmission chain tranny chains are classified into six major organizations.

1.1 Regular Roller Chains. These chains are created for general usage.
1.2 High Performance Chains. These chains have higher tensile strength and greater fatigue power.
1.3 Lube-Totally free Chains. These chains have longer wear life than regular chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with special 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 various types of chains available