joewein
Maximum Pace
- Oct 25, 2011
- 3,532
- 3,693
On my most recent Half-Fast ride I discussed dynamo hubs with Tim (GSAstuto) who made me an offer to rebuild my front wheel (20", 451 size) with a Shimano dynamo hub, keeping the same rim and tyre. My Bike Friday road bike (Pocket Rocket) originally came with 105 hubs, which I wanted to to replace with a dynamo hub to never run out of power for my smartphone. I use it on my bike for GPS-logging rides and for navigating via Google Maps.
Tim ordered a couple of dynamos from Shimano. When he got the DH-3N80 I rode to his house, left him with the wheel and returned by train. The wheel was ready the next day, so I took the train there with my bike bag, installed the rebuilt wheel and rode home again.
Here are some pictures:
Here you can see the contacts for the AC current output, which can be hooked up to lights and/or a USB power adapter:
The 3N80 is based on the mechanics of Ultegra hubs and weighs about 340 g more than the regular 105 hub. It is is a lighter version of the DH-3N72 that it effectively replaces.
There is also a disc brake compatible version, the DH-3D80. Both are available in 32 and 36 spoke versions.
My first impression is that the ride feels smooth, with no noticeable increase in resistance compared to the basic hub, at least when no consumer is connected. The 105 hub is now sitting on my spare parts shelf.
My next step is going to be to buy a USB power adapter to run off the dynamo.
Tim ordered a couple of dynamos from Shimano. When he got the DH-3N80 I rode to his house, left him with the wheel and returned by train. The wheel was ready the next day, so I took the train there with my bike bag, installed the rebuilt wheel and rode home again.
Here are some pictures:
Here you can see the contacts for the AC current output, which can be hooked up to lights and/or a USB power adapter:
The 3N80 is based on the mechanics of Ultegra hubs and weighs about 340 g more than the regular 105 hub. It is is a lighter version of the DH-3N72 that it effectively replaces.
There is also a disc brake compatible version, the DH-3D80. Both are available in 32 and 36 spoke versions.
My first impression is that the ride feels smooth, with no noticeable increase in resistance compared to the basic hub, at least when no consumer is connected. The 105 hub is now sitting on my spare parts shelf.
My next step is going to be to buy a USB power adapter to run off the dynamo.