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.
Other articles related to "hub dynamo, dynamo":
... Bicycle Quarterly reviewed seven different hub dynamos in 2005 ... The SON28 was found to be the most efficient, although its cost was significantly higher than models from Shimano ...
... A hub dynamo enables a built-in lighting system without the loud noise and high drag of a bottle (sidewall) dynamo, and without the unreliability, high cost, ecological disposal problem ... The hub dynamo powers LED or halogen front and rear lights ... to reach to physically position a bottle dynamo or consume set-up time this enables ready, guaranteed lighting regardless of the daylight conditions ...
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