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Bicycle Mechanics and Repair Decal Mechanical Engineering 98/198 spraaang 2014 Lecture 9 Nobody likes a naughty atom because you always have to keep an.

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Presentation on theme: "Bicycle Mechanics and Repair Decal Mechanical Engineering 98/198 spraaang 2014 Lecture 9 Nobody likes a naughty atom because you always have to keep an."— Presentation transcript:

1 Bicycle Mechanics and Repair Decal Mechanical Engineering 98/198 spraaang 2014 Lecture 9 Nobody likes a naughty atom because you always have to keep an ion them

2 Different Component Brands

3 What are Group Components? Brakes Shifters Derailleurs Cassette/Freewheel Chain Rings/ Crank Arms*

4 Other Components Headset Bottom Bracket Wheels Pedals Saddle/ Seat Post Stem/ Handlebars

5

6 Cost Cost of components is usually due to precision, durability, materials, and weight. Each of the main three brands has many different grades of components to fit different needs.

7 Example: Shimano Components $34.99 $49.99 $89.99 $ $299.95

8 Components Headset Stem

9 Introduction to Headsets Allows for fork rotation relative to the bicycle frame Consists of two cups with ball bearings that press into the top and bottom of the head tube

10 Headset Types - Threaded Locknut holds bearings in place Fork steerer tube is threaded Stem descends into headtube

11 Threaded Headset Exploded View Bearing Cartridge Adjustable Race Upper Head-tube Race Quill Stem Wedge Locknut Washer Threads

12 Threaded Headset Triangular wedge holds stem inside steerer tube Nuts keep bearings tensioned Long bolt tightens wedge below The stem does not effect the bearing adjustment

13 Headset Maintenance Threaded Headsets -Unthread Locknut -Remove spacers -Unthread top race -Clean and grease bearings!

14 Stem clamps to steerer tube No locknut Cap bolt holds assembly in place Headset Types - Threadless

15 Threadless Headset Exploded View Cap Bolt Top Cap Stem Spacers Comression Ring Adjustable Race Bearing Cartridge Upper Head-tube Race

16 Threadless Headset Star nut grabs the inside of the steerer tube Top cap pushes on stem and spacers Spacers push on bearings

17 Standard Threadless Headset - Remove stem and spacers - Remove fork - Clean bearings and grease! For sealed bearing headsets, replace bearings if needed

18 Threaded vs. Threadless

19 Same in function as threadless headset Cups are pressed into frame Bearing assembly sits inside head tube Bearings may be housed inside cartridges that are easily removed Headset Types - Integrated

20 Common Problems Shakiness The headset is not adjusted tight enough

21 Stiffness The headset is adjusted too tight

22 Headset tools Headset Wrench Headset Press Headset Remover

23 So e-z, a kid can do it!

24 Preloading Your Headset - Tighten the top cap - Check for rattle by bouncing your front wheel - Check for stiffness by swinging your handlebars

25 Challenge


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