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