3 W Dynamo Power

Posted by: ConRAD

3 W Dynamo Power - 02/02/15 12:18 PM

.. just wondering where and when the universal 3W standard power size, commonly used for bicycle generators, did it come from. With a few exceptions indeed, e.g. 2.4W Shimano and 6W-12V B&M, most of generators on the market today are rated 3W (nominal power).
Anybody knows why?