dwmckee

Hello. I just purchased a new Velogical rim dynamo from Germany that claims to be on par with the efficiency of a good hub unit. When I get this set up I want to run a test comparison to a Sun or other good quality hub dynamo. I do not want to have to purchase a separate hub dynamo though to do a side by side comparison so I was hoping to find someone in the area that would be willing to spend a few hours to make a scientific comparison. If you live near Pittsburgh, PA and have a hub dynamo built into a 700C wheel and are interested in comparing, please Message me through the forum. A picture of teh Rim Dynamo I purchased is below if you are interested.



Thanks,

Don

Hibonite

I've been very curious about this dynamo since hearing about it. Please fill us in on the results when you get a chance to compare.

dwmckee

Sure. I have it all hooked up now (at least temporarily) but too much snow and salt on the road now for my likes to be riding. I have spun it up and the combination is very bright but I cannot yet compare it to a hub unit. The dynamo is impressively small and light albeit a bit fickle to get set up; it is about the diameter of a film canister but not as tall. Once set though it seems pretty solid. It is definitely audible with a low whine when running, but that is spinning the wheel on a stand in a quiet basement; I suspect it will be much less audible when riding. I will get some instrumentation on it after Christmas and will be able to run some performance charts for it. I have the trekking model which should reach full power at about 8 kph. I am using it with an Edelux II and I can tell you that it is an excellent headlight and possibly better than the Luxos U... It has very little spill light so seemingly 90% or more of the LED is focused just where you need it.