Originally Posted by
JohnDThompson
A 16mm cone wrench works fine with Sturmey-Archer cones:
The trick is with the SA cone wrench that you can adjust the cone with the wheel on the bike. Plus the cone wrench is a lot smaller, easy to carry in a tool bag on the bike. If you have to take the wheel off due to a flat, you can be certain that the cones are right when the wheel is reinstalled. Plus they are not expensive!