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Bicycle Glossary - Z

Zefal - A manufacturer of bicycle accessories, especially known for tire pumps.

Zerk fitting - A nipple to which a grease gun can be attached to inject grease. Most modern bicycles do not have Zerk fittings but they are found on antique bicycles from time to time, especially on bottom brackets and rear hubs. Do not use the Zerk fitting. It is much more appropriate to overhaul the component so you can clean and inspect it, and control the amount of grease it will contain.


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Although I have attempted to cover the major safety issues, I cannot be responsible for your use of this information. Working on bicycles is dangerous if you do it without considering consequences of bolts left loose, known problems which are ignored, things which should be replaced but are glued instead, and so on. Proceed carefully at your own risk and use common sense. Jeff Napier, and all agents associated with this information, do not offer any guarantee or warranty for your use of this information

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