Have you ever found USB charging for your lights inconvenient?

If so, a dynamo light is recommended! No more troublesome charging!

The light is bright and illuminates even the darkest areas!

Dynamo lights are powered by the hub, so no batteries are needed.

The light output is high, allowing you to see clearly in pitch black environments and ride with peace of mind.

This convenient item is useful for commuting and shopping, as well as for long rides and bikepacking trips.

The most popular brand for dynamo lights/hubs is the SON NABENDYNAMO series, known for being maintenance-free, long-lasting, and having smooth rotation.

We actually tried riding through the city at night with a SON NABENDYNAMO dynamo light/hub.

It illuminates the path ahead even in areas without streetlights, providing excellent visibility.

We also rode on a dark gravel road.

It illuminates the ground so clearly that you can distinctly see even small stones and the color of the grass.

Two types of parts are needed to use a dynamo light.

The first is the dynamo light unit itself, and the second is the dynamo hub (power-generating hub).

 

【Dynamo Light】SON NABENDYNAMO Edelux II

This is the light unit itself, connected by a wire from the dynamo hub to illuminate the path ahead.

Since it stays lit constantly while riding, there's no need to worry about the battery running out.

For those who cycle daily, battery charging can become a hassle.

This solves all battery-related issues.

The Edelux II also has a power storage function within the light unit.

This means the light won't go out during short stops, such as at traffic lights.

Additionally, you can select three modes—ON, OFF, and Auto—by turning the dial on the unit.

The Auto mode is an excellent feature that automatically turns the light on at dusk or when riding through tunnels.

Since the light unit is compact, it offers a neat and tidy appearance when installed, which is a great advantage.

The Edelux II clearly distinguishes between "areas to illuminate" and "areas not to illuminate."

The ability to precisely control the beam pattern, for example, to illuminate far ahead without blinding oncoming people, is also a key feature.

 

【Dynamo Hub】SON NABENDYNAMO SON 28

A dynamo hub is a front hub with a built-in generator function.

It features a slightly bulging appearance due to the internal generator coil.

While the rotation becomes slightly heavier during power generation, it's barely noticeable when actually riding.

Please note that dynamo hubs are categorized by brake type and axle specifications.

◆6-bolt disc brake / QR axle type

◆6-bolt disc brake / Thru-axle type

◆Rim brake / QR axle type

 

If you were to replace your current wheels with SON NABENDYNAMO, the estimated cost would be:

Dynamo Light Edelux II: 28,600 yen

Dynamo Hub SON 28: 47,300 yen

Spokes and Nipples: approximately 8,000 yen

Labor: approximately 6,000 yen

Total: 89,900 yen (approx. 90,000 yen)

The total cost may vary slightly depending on the dynamo hub specifications, so please inquire for details.

Grumpy Loan is also available for custom dynamo hub and light requests.

Also, Grumpy can take your original front hub as a trade-in.

Don't hesitate to upgrade to new parts, even if you've been using a good hub until now.

We hope the trade-in value can help offset some of the cost.

Finally, there's one drawback to dynamo hubs and lights: they can be difficult to remove the wheels.

This is because the terminal part connecting to the hub body can be stiff and cumbersome to attach and detach, taking time.

There's a convenient item to solve this.

SON NABENDYNAMO Coaxial Adapter

This part is attached to the end of the light cable.

It's a super convenient item that allows you to detach the wheel simply by pulling it out, like unplugging an earphone jack.

↑ Here's what it looks like when attached to a bicycle.

This makes attachment and detachment easy, making it even more convenient and user-friendly.

SON NABENDYNAMO dynamo hubs and lights are in stock at Grumpy, so assembly can be done immediately.

We highly recommend the "automatic lighting, no charging required" dynamo light to everyone who rides a bicycle at night—please give it a try.