Why Dynamo?

Every bike should have a dynamo hub.

With a dynamo hub, if the bike is moving, you have lights. It’s as simple as that.  

Never again will you ride into the dusk only to realize that you forgot your lights or watch your uncharged lights dim mid-ride.

Why Dynamo?

With a Dynamo hub on your bike, your light set up is:

Always Charged

With a bicycle light that’s always charged, you’ll stay visible and safe on nighttime rides without the hassle of remembering to recharge it. It’s convenient and gives you peace of mind, so you can focus on enjoying your ride instead of worrying about battery life. Plus, you won’t have to deal with sudden power failures, keeping your journey smooth and worry-free. Find out more!


Bolted directly onto your bike, dynamo lights are much less likely to be stolen. Battery lights need quick-release mounts so they can be easily removed for charging, which means if you forget to remove them when you’re locking up to get groceries or see a movie or whatever, they sometimes aren’t there when you come back. Find out more!

One Less Thing to Worry About

Decision fatigue is real, and exacerbates the physical fatigue of cycling. Taking away the decision about when to turn on lights and when to charge them can make an enormous difference.  Whether you’re touring or bopping around town,why not simplify your mental load? Find out more!

An On-The-Go Power Source

You can absolutely charge devices from your Dynamo hub on a long tour. For the steadiest charge, we recommend using the dynamo to charge a battery pack, and then using that to charge your devices. Find out more!

Let’s talk Power

It’s hugely liberating to never have to worry about charging lights, or packing lights for a ride that may or may not end in the dark, or running lights during the daytime for safety on a busy road without worrying about running out of battery when it gets dark and you need them for seeing.

Person Powered

Watch this beautiful illustration of how much power a human can produce:

Ready to power your own lights with a Dynamo hub?

It takes a real hulk to run that tiny toaster for barely long enough to put a little hint of color on that bread.

Nominally, most dynamo hubs put out about 3 Watts, which means a ~12 Watt-hour battery in a cell phone should be charged after 4 hours of riding, but it’s not so simple as that. The dynamo doesn’t just output a nice smooth 5VDC/600mA supply, it needs to be rectified and regulated, and that power can drop off a lot when you’re climbing or stopping for traffic.

If you just plug your device straight into the charger connected to the dynamo, you can often end up draining power, because the screen keeps turning on as power is applied, then removed over and over as you’re starting/stopping or speeding up/slowing down.

Your best bet is usually to use the dynamo to charge a battery pack, and then use that to charge your devices.  For a many-day ride deep in the backcountry, a combination of solar charging, dynamo charging a battery pack, and using grid power whenever available is the way to go.

All that said, modern LED lights are amazingly efficient, and it’s amazing how bright they can be for such a small usage of power.

Particularly sensitive riders say they can feel the difference between riding with or without a dynamo, some even say they can feel “vibration” as the magnets in the hub shell energize the windings in the stator, but I’ve never noticed a difference. With aero helmets claiming 10 or more Watts of power saved, the 3 Watts of the dynamo is definitely in marginal gains territory. Time trialists have a rule of thumb: 5W = 0.5sec/km. So over a 600km brevet, the dynamo costs about 3 minutes.

That’s a fantastic tradeoff for not having to think about charging lights!