I tried a number of solutions for this problem. The one that works for me is to bond the inner spacer and inner bearing race to the axle with clear silicon RTV. When you do this the first time assemble the wheel and load the bearings before the RTV cures to get all the clearance out. For tire and brake work I leave the spacer and inner
race on the axle and clean them with some solvent in a touch up gun. For the outer race I drilled two small holes in the flange to which the grease seal is bonded and safety wire it to the cotter pin. The safety wire has to be wrapped tight to avoid contact with the rollers. You can install the safety wire on the flange and confirm the clearance before you assemble it on the axle. The orientation
of the wire to the cotter pin is such that the normal direction of rotation loads the wire in tension. With this setup you can set the nut for a moderate preload without fear of spinning the bearings.
Bill Hannahan
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