Spacers.

I just received a set of wheel spacers for NAPSACK. They fit ok but they don't sit "tight" on the center axle. If I set them on then here is a gap between the center hole of the spacer and the bottom of the axle of about 1/4 inch. So here's my question....If I center them on the axle so that there is a 1/8 inch gap all the way around .... and put some glue/epoxy to hold them in place whilst I fit the wheel and tighten it down...will that be ok? I can't imagine that they will move once the wheel is tightened down so the glue is just enough to temporarily hold it in the correct place. Any thoughts/experience please?
Philip
Philip