How does a hub dynamo work?

A dynamo hub is a hub that produces electricity when the front wheel turns. It uses a small internal generator that works by passing powerful magnets over a coil. A wire connects the hub to whatever it is you want to power. It’s as simple as that!

How much does a dynamo hub slow you down?

Given the leverage of a wheel and the flywheel effect of the rotating mass, dynamo hub drag only has a small effect on your speed. The result for most people is likely to be an extra three to six minutes riding time over 100km, all while getting a good charge to your electronics (or while running lights).

How do dynamo bike lights work?

Basically it’s a backwards electric motor. Rather than using electricity to create rotation, a dynamo uses rotation to create electricity. As you can see, bottle dynamos are mounted beside the wheel and have a little wheel which runs against the tyre, converting its rotation to electricity to power the attached light.

Are dynamo hubs worth it?

Dynamo hubs can save you time- Because you can charge your devices while you ride, you never have to sit around a power outlet waiting for your batteries to charge. This allows you to spend more time riding. For this reason, dynamo hubs are ideal for long-distance Randonneur riders and endurance racing.

Can a dynamo hub charge a phone?

Your dynamo hub can charge lights, an external battery, a GPS unit or your smartphone during rides. Touring cyclists can charge USB devices on the road.

Is a dynamo hub worth it?

Are dynamo lights legal?

Dynamo powered lights are legal even though traditionally they have gone out when you stop (modern dynamo systems have ‘standlight’ technology which means that the light stays on for a while after you have stopped – another German legal requirement).

How much power does a dynamo hub produce?

3 watts
Often the hub “dynamo” is not actually a dynamo, which creates DC, but a low-power magneto that creates AC. Most modern hub dynamos are regulated to 3 watts at 6 volts, although some will drive up to 6 watts at 12 volts.

Are dynamo bike lights legal?

Dynamos. Dynamo powered lights are legal even though traditionally they have gone out when you stop (modern dynamo systems have ‘standlight’ technology which means that the light stays on for a while after you have stopped – another German legal requirement).

How much does a dynamo hub cost?

Dynamo hubs are Expensive- Entry-level dynamo hubs cost around $60-$100. High-end dynamo hubs cost around $300-$400. A headlight will cost around $40-$100. A USB charger costs around $60-$220.