Bike Maintenance Class
From HacDC Wiki
This page will summarize what was gone over in each class and have links to further reading.
Week 1: Introduction and Flat Repair
What was covered
Component Identification and Basic Terminology
What's What on a Bike
Drive Side and Non-drive Side
The right side of the bike is referred to as the drive side while the left side is the non-drive side.
How to talk about gearing
Gears closer to the frame are referred to as inner gears while the ones furthest from the frame are the outer gears. High and low in relation to the gears describes the relative mechanical advantage of the gearing. An easy mnemonic for this is Higher gears are harder while lower gears are easier. The inner gears on a bike are always going to be the lower gears and the outer gears are the higher gears.
Right-hand vs Left-hand Threading
Almost every threaded component on a bike is going to be right-hand threaded, which means that turning it clockwise will tighten it and turning it counter-clockwise will loosen it. Pedals and bottom bracket cups are examples where you would run into left-hand threaded components. To identify the handedness of a component hold it in front of you as in the picture below. The direction that the threads slant up too corresponds to the components handedness.
Valves: Schrader and Presta
The two types of valves you will see on 99% of bikes in America are schrader and presta. Schrader valves are the same type of valve that you see on cars and most other pneumatic tires. Presta valves are
Cleaning and lubing the chain
- Understanding brake and wheel quick release mechanisims
- How to remove a tire with tirelevers
- Identifying puncture source (don't forget to keep everything lined up!)
Repairing flat tires on demo wheels.
More than you really need to know about flats: Sheldon Brown Tells All