I have a Gazelle dutch bike which I want to upgrade with a front dynohub. It currently has a Sturmey Archer drum-brake hub dated 1988, which I believe to be a SBF model. I bought a wheel with a Shimano DHC6000 plus the accompanying roller brake. I only now noticed that it has an axle with 9 mm diameter and the currently equipped Sturmey Archer hub has a 3/8" axle. That means the old one is about 0.5 mm thicker.
Can / should I put that new wheel in? Will the extra spacing in the fork dropout mean any problems, especially safety wise?