Bicycle Part - Gear Shifter
A bicycle shifter or gear control or gear levers is a component used to control the gearing mechanisms and select the desired gear ratio. Typically, they operate either a derailleur mechanism or an internal hub gear mechanism. In either case, the control is operated by moving a cable that connects the shifter to the gear mechanism.
Traditionally shifters were mounted on the down tube of the frame or stem. For ergonomic reasons, they tend to be located somewhere on the handlebars on modern bicycles.
There are various types of shifter:
What is the effect of using HIGH, MEDIUM, LOW gear combinations?
High gear – Heavy in pedaling (low cadence) but bike move fast (normally flat road).
Medium gear – Slight lighter than high gear, but bike move slower (normally leisure ride).
Low gear – Light in pedaling (high cadence) but bike move slow (normally slope or uphill).