rider pushes the peddles - chain begins to turn, chain turns the back wheel - wheel begins to turn, breaks are pulled - break blocks squeeze the wheel rim, gear level is moved - chain jumps to a new cog, rider turns the handle bars - bike changes direction, tyres are fully inflated - rider will have a smooth ride, seat is adjusted correctly - rider will be able to reach the peddles safely, chain is oiled - movement of the chain will be smooth , tyre treads become worn out - the bike may lose its grip on the road, lights are turned on - rider can see safely night,

How a bike works - cause and effect

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