Question

HOW CYCLE WORKS,BEFORE GIVING ANSWER THINK FIRST,IT IS NOT EASY U CAN SEARCH IT​

Answer 1

On some bicycles, there is only one gear and the gear ratio is fixed. Many contemporary bicycles have multiple gears and thus multiple gear ratios. A shifting mechanism allows selection of the appropriate gear ratio for efficiency or comfort under the prevailing circumstances: for example, it may be comfortable to use a high gear when cycling downhill, a medium gear when cycling on a flat road, and a low gear when cycling uphill. Different gear ratios and gear ranges are appropriate for different people and styles of cycling. This is how gears work in the bicycle. Two parts of bicycle are needed for gear shifting. First set of parts are the derailleurs.

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