Questions tagged [dynamo]

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21
votes
8answers
4k views

Why are battery-powered lights so popular?

Both on this site and "in real life", battery-powered lights appear to be at least as popular as generator-powered lights. I have always been slightly confused by this. To me, a generator-powered ...
14
votes
4answers
12k views

Bottle dynamo vs. hub dynamo

I have SpinPOWER USB charger kit, and I am using a bottle dynamo with it. I have heard that the power output from a hub dynamo is higher than from a bottle dynamo. Does anyone have any information ...
13
votes
2answers
2k views

Consequences of driving a dynamo backwards

My bike has a hub dynamo in the front wheel. Recently I have replaced the old fork with a used one I got from my local bike club. The new one has fixing points for the cabling on the other side of the ...
13
votes
5answers
5k views

Using hub-dynamo for both lights and charging, with priority on lighting

I currently have a Supernova E3 Pro powered by a Shimano hub generator, and I would like to add the ability to charge USB-powered gadgets. My main concern, however, is that simply wiring up a charger ...
11
votes
3answers
5k views

What kind of maintenance does a shimano dynamo hub need?

I have a shimano dynamo hub on the front of my bike. Does it need any special maintenance, or maybe it needs just a little synthetic grease once a year, like a normal front hub?
11
votes
3answers
1k views

Does anyone make a dynamo light buffer battery that will keep it going at full power?

I have a nice SP dynamo hub and an old Supernova E3 Triple dyanamo light. However, the dynamo light isn't very bright when I'm starting my ride, as my ride has a long hill at the very start, so I don'...
11
votes
2answers
4k views

Are there any high power bicycle generators?

I have been searching for a generator or 'dynamo' (preferably one built into the hub) to run lights for night riding, but it seems that most are rated for only about 3W (presumably to meet German ...
10
votes
6answers
2k views

Just how bad are bottle dynamos?

My tourer has a dynamo front wheel, which is great. It's so handy* that I ended up using it for most of my commuting over the winter, despite having a hybrid that should serve as my foul-weather ...
10
votes
2answers
2k views

Dynamo hub lighting system recommendation

I'm considering outfitting my hybrid/commuter bike with a front dynamo hub and associated lighting. Currently, looking at Sanyo, Shimano, and Schmidt dynamo hubs. The Schmidt's are pretty pricey, ...
9
votes
3answers
1k views

Flashing light when pushing bike with (constant) low speed

When someone pushes his bike beside him in a constant (low) speed the light will not be at constant (low) brightness, instead it will flash with it's full brightness. Why does it work like that?
9
votes
2answers
2k views

Are there Dynamo powered, rear flashing lights? [closed]

I run a SON hub dynamo and have recently upgraded my front light (the old light and the dynamo are ~10 years old). The new one is much brighter than the old and has a USB outlet for charging stuff, so ...
8
votes
3answers
3k views

How to waterproof Shimano dynamo connector?

I have a Shimano DH-3N31-NT hub dynamo with following type of connector: Yesterday, diodes in the bridge rectifier of my front LED light exploded. While I was disassembling the light, I noticed that ...
8
votes
1answer
13k views

How do you install a hub dynamo?

I want to buy a Shimano hub dynamo, but I'm encountering problems getting a bike shop to commit to installing it for me if I buy it. So I have a couple questions that I'm hoping some of you guys might ...
7
votes
3answers
2k views

What options do I have to charge my GPS and Phone using a dynamo hub?

I'm planning to purchase a supernova infinity-8 dynamo hub and wanted to use this during daylight hours to charge my Phone and GPS during bike tours. What products are available that will work with ...
7
votes
4answers
705 views

Will running an LED designed for batteries on a NEXUS dynamo hub damage the LED?

I have a question about LEDs on 6V Shimano dynamo hubs. I built up an old Schwinn with a Nexus dynamo hub, and the headlight I'm using is based on an LED 6V headlamp. The LED is a Chip-on-board design,...
7
votes
2answers
4k views

How to check your dynamo system?

I just bought my first hub dynamo (Shutter Precision PL-8) with dynamo headlight (Busch + Müller Lumotec IQ2 Eyc N Plus). After installation I figured out that light is not working. How to determine ...
6
votes
1answer
289 views

On fitting 700C rims to a dynamo hub rated for up to 20"

I am currently in the planning stages of creating a really fancy front fork for my bike. For a little background, I want to try to get this custom built Burrows monoblade with disc mount: https://...
6
votes
2answers
812 views

Wheel with Centerlock hub for disc brakes and rim for caliper brakes

Does it make sense to build a wheel with a hub with Centerlock for disc brakes and a rim for caliper brakes? My idea is to use the front wheel with a dynamo on two bikes, if I decide that I need a ...
6
votes
3answers
12k views

Can I run rim brakes on a disc rim?

I'm trying to buy a front wheel which will work with both disc and rim brakes so that I can use it on my cross bike (with rim brakes) and my mountain bike (with disc brakes) with a dynamo hub to power ...
6
votes
2answers
1k views

Are any anti-theft GPS trackers dynamo powered?

I am considering an anti-theft GPS tracker for my bicycle, but I am worried about battery life. Are there any that recharge from a hub dynamo?
6
votes
1answer
123 views

Dynamo cutting out after a couple of seconds

This sounds like I've an electrical issue, but no idea of next steps. I have a Gazelle Tour Populair with what I believe is a Busch & Müller LYT Lumotec Retro front dynamo-powered light. When ...
5
votes
2answers
2k views

Are there LED based dynamo powered lights suitable for night time MTB riding on singletrack?

Are there LED based dynamo powered lights suitable for night time MTB riding on singletrack? Likely they would need to have: High Brightness, likely 500 lumens or better. Not sure how that translates ...
5
votes
2answers
284 views

Dynamo hub cones regulation

I have bought my first dynamo hub wheel with Shimano DH-3N72 hub. The axle of the wheel fells like if it is over-tightened a bit, it rotates with feeling of clicks. Should I loose the cones in the ...
5
votes
1answer
315 views

Has SRAM discontinued i-light hub dynamo?

I haven't been able to find SRAM hub dynamos lately. Has SRAM discontinued making of hub dynamos?
5
votes
1answer
1k views

Combining a Dynamo hub with a single speed geared hub setup

In theory, can you build a dynamo hub, say a SON, with a fixie/single speed gear, all mounted in the same hub and wheel? I will be building a touring rig with an extra wheel trailer and I would like ...
5
votes
0answers
89 views

How do you repair or lengthen a B&M Luxos Control Cable?

Maybe this would be better off in electronics, but since it's bike gear specific, I thought I'd try here first. I need to have longer control cables on B&M's Luxos U headlight/charger combo. This ...
4
votes
3answers
9k views

Hub dynamo, maybe loose contact; maintenance?

I experience problems with my Shimano hub dynamo. A few days ago, I stood in the dark, without any visible damage. Measurement prove that the dynamo does not deliver power. I measured DC and AC ...
4
votes
1answer
165 views

Rim dish and flange angle problem

this is the n-th time I have faced with this problem. The problem is than one flange of the rim is higher than another one. As you can see on the photo. My rim is new this time, I have dynamo hub. ...
4
votes
1answer
101 views

Are dynamo hubs specific to particular lights?

I am looking to purchase a dynamo hub, such as those made by Shimano, Son, Exposure etc. and a set of lights to connect to it. What I want to know is if any dynamo light will work with any dynamo hub, ...
4
votes
2answers
675 views

Using trainer as dynamo

I was wondering if it is possible to to use a magnetic trainer as a dynamo. While riding on trainers, at a gym, or at home, I always think to myself, "I wish I could capture all this energy and put ...
4
votes
1answer
689 views

Dynamo bike lights - unknown short circuit cause

I've bought and installed dynamo powered lights on my bike. A little bit about the setup - It's the bottle dynamo kind pressing against the tire system. The Dynamo produces current turning clockwise ...
4
votes
1answer
141 views

How can I spin a dynamo wheel at road speed for bench testing?

I can check my dynamo works by spinning the wheel on the workstand or just riding, but I'd like to do some more involved testing. I'd like to develop some custom electronics to use the extra power ...
3
votes
4answers
2k views

Do you need to ride gentler with a dynamo hub?

I am going to purchase a dynamo hub and the way I like to ride is carefree abandon - going offroad, up and down curbs, straight through potholes, etc. My bike is a 90's rigid mtb with road tyres (26")....
3
votes
3answers
1k views

Should I replace both wheels/rims if I convert the front to a dynamo hub?

The title mostly says it all. Is there a reason to or a reason not to replace the back wheel or rim if I replace the front wheel to get a dynamo hub? The only reason would be aesthetics, to keep the ...
3
votes
2answers
1k views

How can we calculate the efficiency of the Siva Cycle Atom generator?

The Atom is a bike electricity generator made by Siva cycle and launched via kickstarter. I was curious about how this generator compares to others (eg. hub dynamo/generators) in the market in terms ...
3
votes
3answers
115 views

Does asymmetric rim go with dynamo hub?

I'm building a dynamo hub wheel. I see there's symmetrical and asymmetrical rim and not sure which one I should go with. I'm using son dynamo 28 if that makes difference. My front wheel has SRAM ...
3
votes
1answer
382 views

What kinda of maintenance does a Sturmey Archer X-FDD DynoBrake hub need?

I have a Sturmey Archer X-FDD dynohub and drum brake for about 2 years. I've riden it about 6000 miles and I don't know if it is due for maintenance or even what kind of maintenance is required. I can'...
3
votes
2answers
497 views

AC dyno light on battery pack?

I'm running a Supernova E3 PRO 2 of my dynohub. However I would like to use my non-dynohub front-wheel whilst still being able to use the same lights on battery power. The lights have an internal AC/...
3
votes
1answer
361 views

Are there dynamo powered front flashing lights?

I have a bright battery powered front light and I'm looking for a flashing "be seen" front light that's connected to a dynamo so it's always on whenever I ride. Standlight would be ideal, but isn't ...
3
votes
1answer
210 views

Charging a Garmin Oregon GPS

Does anyone know if you can charge a Garmin Oregon GPS from a bicycle hub dynamo with the optional rechargeable batteries? Thanks Karl.
2
votes
2answers
918 views

Bottle dynamo: the steel wheel quickly wearing down?

4 weeks ago I replaced the bottle dynamo on my bike (see this question). Now, after 4 weeks of commuting for a total of something less than 600 km, the dynamo runner looks like this It won't take ...
2
votes
2answers
1k views

Checking that the dynamo hub works

I just bought a second-hand bike for my daughter knowing that the dynamo hub was not working and now I would like to try and repair it. I tested that the dynamo does not produce electricity. I also ...
2
votes
1answer
161 views

Rear stand light on a Cube Nuroad FE not working

I bought online a Cube Nuroad Race FE 2021 that comes full with fenders and dynamo lights. The front light is the Supernova E3 Pure and, although not stated clearly on Cube's site, the rear light ...
2
votes
3answers
2k views

Replacing a normal hub with a dynamo hub

I'm the owner of a Kona Sutra 2017. I'm pretty happy with this bike, but I'm looking to get a dynamo hub for it, with some lights and maybe a charger for my phone. So far I managed to figure out that ...