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Derailleur is the French word for a bicycle gear mechanism that moves the bike chain from one cog or sprocket to another. The derailleur also has a mechanism for taking up the slack in the chain as it moves to smaller cogs. Many of these problems can be fixed byContinue Reading

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Balance balls, exercise balls, or Swiss balls are large inflatable balls that people use for all sorts of imaginative exercises. Some people have even started sitting on them at work. But balance balls tend to roll out from under people when they move or reach across the desk for aContinue Reading