that isnt my pic, its an ad.

My axle has 1 nut either side of the hub and also 2 caps (cones) that cover the bearings.

Trekkie: The one I can't remove is jammed right up against the cone. If I could get the cone with a spanner then I could use that to loosen the nut, but because the nut is larger than the cone, and the cone has a very thin head I would need a spanner that is less than half a cm across. Thats all the space there is in between.

Can anyone advise me on the best replacement for this? Should I get a whole new wheel or can you just buy the bold and nuts?