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19 Chain and drive wheel
19.1
The chain and drive wheel are made from rust proof materials.
19.2
Lightly oil with bicycle chain oil the chain at least once a month.
19.2
Because your bike has a rear derailleur the chain will be automatically adjusted.
20 Derailleur maintenance and adjustment
20.1
Required Tools
You’ll need a dry cloth, a Phillips screwdriver, a 5mm Allen
wrench, and a light lubricant.
20.2
Rear Derailleur
20.3
How derailleur work
Almost all modern derailleur function the same basic way.
They are designed to move (or derail) the chain from one sprocket to the next.
The upper guide pulley (or jockey pulley) moves the chain in both directions.
For instance, when you want to climb a hill, you shift down to a lower gear. This
pulls the shift cable and forces the guide pulley to change to a bigger sprocket.
When you want to go faster, you adjust the shifter to a higher gear. This
releases shift cable tension and allows the derailleur springs to pull the guide
pulley back down to a smaller gear. Each time you shift gears, the length of
chain changes. The lower tension pulley is spring-loaded to take up this slack.
20.4
Adjustment screws
There are 3 adjustment screws - the B-Screw (B-tension
adjustment), the H-Screw (high gear limit stop) and the L-Screw (low gear limit
stop). Adjustments on these screws should always be made in 1/4 turn
increments.