Shimano DH-3N20 Review - Overview
The Shimano DH-3N20 is a budget, entry level hub dynamo. Which is available in a variety of flavours, 6V 3W or 6V 2.4W, with a quick release and a bolted variety. This review deals with the 6V 3W nutted axle variety.
Shimano DH-3N20 Review - Price
A top of the range bottle dynamo will cost you more than this hub, and you should go for the DH-3N20 for sure, it is silent. With a bottle dynamo wirring away you will not enjoy rides in the country anymore.
I paid £29.99 for mine from JE James Cycles, I think they are normally £35 so still affordable. Of course the biggest challenge is building the dynamo in to you wheel! But don't let this put you off, wheel building is surprising forgiving.
Shimano DH-3N20 Review - Build in to Wheel
You may notice from the above picture that the spokes are twisted together to make a butterfly spoke pattern, this not because I am an expert wheel builder . . .far from it it is because the spokes I had were too long, and rather than send them back I twisted them around each other to make them effectively shorter. They are 10 years old and have been used twice before, and came off a rear dished wheel, so I was using two different lengths . . . . all I am saying is that with all of these cr@ppy influences the wheel performs just fine. SO have a go you may be surprised.
Shimano DH-3N20 Review - Performance
The DH-3N20 will light my LED lights at a slow walking speed. However, the front light a
Lumotec Lyt Senso Plus will flicker at these low speeds, however, it is almost impossible to ride this slow, and a slow pace of the bike will result in full illumination of the front light. The rear light a
Busch and Muller ToplightPlus lights fully at walking pace and is a very good light.
Shimano DH-3N20 Review -Conclusion
If you are looking to move away from bottle dynamo then this will do the trick, studies (
vintage bicycle quarterly) have shown that the DH-3N20 compares well to some expensive hub dynamos, so you are getting a bargain! If you can build you own wheel then you can do it very cheaply.
More on wheel building.
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Shimano DH-3N20
Reviewed by Kermit Green on
Oct 18 2012
Rating: 5.0