Toshi
10 kW
In working on my Nexus 7-speed rear hub tonight I had to page through the manual a bit. In the manual I saw that Shimano makes a variety of "non-turn washers" to accommodate for different dropout angles. These anti-rotation washers are necessary on internally geared hubs because the shifting mechanism and the roller or coaster brake if specified are indexed to the axle, and thus the axle needs to remain at a fixed angle.
Sound familiar?
The main (and significant) problem with my mini epiphany, now that I think more of it, is that the Shimano axle isn't the same size, thus negating its off-the-shelf advantage. The Shimano axle's round portion fits within the 9mm width of a standard dropout, so its flat section must be more like 6.5 or 7 mm... A shame. Otherwise, this could have been a decent solution. I believe eZee uses washers similar to these on their own e-bikes.
The relevant section from the manual that sparked my interest:
Sound familiar?
The main (and significant) problem with my mini epiphany, now that I think more of it, is that the Shimano axle isn't the same size, thus negating its off-the-shelf advantage. The Shimano axle's round portion fits within the 9mm width of a standard dropout, so its flat section must be more like 6.5 or 7 mm... A shame. Otherwise, this could have been a decent solution. I believe eZee uses washers similar to these on their own e-bikes.
The relevant section from the manual that sparked my interest:
