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