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The Spoke Curriculum - Session 1: Difference between revisions
The Spoke Curriculum - Session 1 (view source)
Revision as of 04:15, 16 February 2012
, 16 February 2012→Content
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! scope="col" | Instructor Notes | ! scope="col" | Instructor Notes | ||
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| | | The bicycle is made of a few main components. The frame is the main tubes of the bicycle: commonly in a classic diamond design. The fork holds the front wheel in its dropouts, and the stem clamps onto the fork and the handlebars. The saddle attaches to the seatpost. The rear wheel attaches to the rear dropouts. | ||
The pedals attach to the cranks, which are attached to the bottom bracket. The chain runs around the cogs and the chainring, and derailleurs push it from side to side. | The pedals attach to the cranks, which are attached to the bottom bracket. The chain runs around the cogs and the chainring, and derailleurs push it from side to side. | ||
The word | The word '''wheel''' refers to the entire assembly of tire, tube, rim, spokes, hub, and cogs. They all turn on the axle of the wheel. The key parts that allow the wheel to turn are the ball bearings, which are sandwiched between a '''cup''' that holds the bearings, and a '''cone''' that rests against the inside of the bearings. [http://www.parktool.com/uploads/images/blog/repair_help/hub74.jpg] | ||
[[File:MONARK-01.jpg|thumb|Pass around a physical cutaway to make everything clear.]] | |||
Both wheels, the bottom bracket, pedals, and the headset all use this same basic mechanism to rotate. We will learn how to service wheel hubs and bottom brackets, and possibly headsets too, but the procedures are usually very similar. | Both wheels, the bottom bracket, pedals, and the headset all use this same basic mechanism to rotate. We will learn how to service wheel hubs and bottom brackets, and possibly headsets too, but the procedures are usually very similar. | ||
| Show a bottom bracket when talking about them, since it's not apparent what that is or how the cranks attach to it. Showing a cutaway hub, with caged bearings showing, as well as a separate, loose cup & cone assembly is very helpful to demonstrate hubs. | | Show a bottom bracket when talking about them, since it's not apparent what that is or how the cranks attach to it. Showing a cutaway hub, with caged bearings showing, as well as a separate, loose cup & cone assembly is very helpful to demonstrate hubs. | ||
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