Gears and Proportions

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OBJECTIVE: To teach students how bicycle gears work and the relationships between the sizes of front and rear gears, gear ratios and relative speeds of the bicycle wheels. Students later list gear combinations and ratios for bicycles of different speeds. 

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Grade Level(s)
  • 3 - 5th Grade
  • 6 - 8th Grade
Transportation Topic(s)
  • Highway
  • Transit
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This material is based upon work supported by the U.S. Department of Transportation under Cooperative Agreement No. DTFH6114H00004. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the Author(s) and do not necessarily reflect the view of the U.S. Department of Transportation.
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