Hub Dynamo

A hub dynamo is a small electrical generator built into the hub of a bicycle wheel that is usually used to power lights. Most modern hub dynamos are regulated to 3 watts at 6 volts, although some will drive up to 6 watts at 12 volts.

Read more about Hub Dynamo:  Models, Efficiency

Famous quotes containing the word hub:

    There is no object so soft but it makes a hub for the wheel’d universe.
    Walt Whitman (1819–1892)