1. Transmission Chains
Power tranny chains are categorized into six major groups.
1.1 Standard Roller Chains. These chains are created for general usage.
1.2 POWERFUL Chains. These chains have higher tensile power and greater fatigue 
power.
1.3 Lube-Free Chains. These chains have longer put on life than regular chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with particular corrosion resistance.
1.5 Specialty Chains, Type 1. For particular applications.
1.6 Specialty Chains, Type 2. For general designs.
Within these six groups, there are plenty of types of chains transmission chain available