You will have to do that by adjusting the nut thickness, or adding shims. Or possibly both.Be sure, when building the wheel/brake assembly, to get the overall width exactly the same as the distance between the fork blades, otherwise tightening the wheel spindle will end load the bushes in the lower link causing suspension stiffness. Cheers, Stu.
I have measured 158 mm which is substantially more than 6".I only have a steel hollow axle that I can get at to measure. The over all length of that is 6.006" or 152.57 mm. My guess is that they should be a nominal 6".
those Nilos only need the slightest pressure when brand new to ensure they create the labyrinth seal. Once that groove is worn into the bearing face, then as long as they are a snug fit no pressure is requiredI also need to make sure there is a bit of pressure on the Nilos bearing seals. I need more shims!