When everything is assembled correctly and tightened, you should have a line to line connection (left to right) between the spacer nut, the left inner bearing race, the wheel spacer, the right inner bearing race and the axle.
The bearing on the left side must be pressed all the way into the wheel. This establishes the wheel spacing which aligns the brakes and discs.
There should be a gap between the right hand bearing and the wheel. This allows for manufacturing tolerances and thermal expansion. If the right hand bearing is bottomed out in the wheel, something is not correct.
Note that when installing, you press only on the outer races of the bearings, but once installed, all tightening force should pass through the inner bearing races.
