... 6V is the real-life voltage once you apply a load ...
IT DEPENDS ON THE LOAD, OBVIOUSLY !!!
Just for your information:
- Picture 1 shows Voltage and Frequency at no-load conditions at 20 km/h on a 28" wheel.
- Picture 2 shows Voltage and Frequency on a 12 Ohm resistor at 20 km/h on a 28" wheel.
- Picture 3 shows Voltage and Frequency on a 40 Ohm resistor at 20 km/h on a 28" wheel.
All below data are referred to Shimano DH-3D32-QR hub dynamo.
As you can see all values are referred to 20 km/h, if you go at 40 km/h then frequency will double and voltage will tend to increase significantly.
Cheers.
![](https://4.bp.blogspot.com/-3C1RKQKlmsU/V7wDUFNwA1I/AAAAAAAAVyQ/TLON5Pejq38exMFAdT-9zYgmeJ-CGmDcwCLcB/s320/Frequency%2Bat%2B20kmh.jpg)
![](https://4.bp.blogspot.com/-R9GVuF-fnxw/V7wfViknP5I/AAAAAAAAVyg/A9RHDy2BN-guwPHJeNPsvQ3cmNeWBLq8gCLcB/s320/Frequency%2Band%2BVoltage%2Bat%2B20kmh_12%2BOhm.JPG)
![](https://3.bp.blogspot.com/-kcMGLvQSlvI/V7xDyf-yDEI/AAAAAAAAVyw/XEvKe4l8wsIjBJBXl-zC8_7Koh81GvBNgCLcB/s320/Frequency%2Band%2BVoltage%2Bat%2B20kmh_40%2BOhm.JPG)