Breaker

This chapter has several sections. It should be read carefully to prepare for using all the other chapters. The first section is GENERAL TERMINOLOGY OF BICYCLE PARTS. This section covers only the most basic and universal terms. The other chapters will each start with a terminology section with terms that are more specific. The second section is THREADS. Understanding thread descriptions and thread types is perhaps the most important basic mechanical skill. The third section is PRESS FITS. Press fits are a means of holding pieces together other than by threading them. It is a system with its own unique set of techniques and rules. The fourth section is LUBRICANTS. Understanding the proper use of greases and oils is critical to being a good mechanic. The fourth section is CLEANSERS AND POLISHES. This section covers what types of cleansers, solvents and polishes might be used, and how to use them properly. The last section is TOOLS. This section covers use of common mechanic?s tools. The other chapters describe how to use bicycle mechanic specific tools. A list of recommended tools is in the appendix. Down tube: The lower tube of the frame that extends from the bottom of the head tube to the bottom of the frame (the bottom-bracket shell). Seat tube: The near-vertical tube that is at the middle of the frame, which the seat post slides into. Bottom-bracket shell: The portion of the frame that contains the crankset bearing parts, which are called the bottom bracket. Seat stay: The two tubes of the frame that start from below the seat and meet the chain stays at the center of the rear wheel. Chain stay: The two tubes of the frame that go from the lower end of the seat tube and meet the seat stays at the center of the rear wheel. Dropout: The fittings at the end of the fork, and at the juncture of the seat stays and the chain stays, to which the wheels are attached. Top tube Seat stay Head tube Seat tube Chain stay Dropout Down tube Fork.