I replaced the back wheel on my sons bike today. I am not sure exactly what happened but I think somehow the bearings on one side of the back wheel got mangled. This led to alot of play in the wheel making it essentially un-rideable.
I decided to swap the wheel with the broken bearing for another wheel. In the next few weeks I will completely recondition this wheel and keep it as a spare.
I replaced the existing, single-walled, wheel with an old, double-walled rear wheel from my daughter's bike. Some time ago this wheel got badly buckled. I bought a replacement wheel as I did not have time to fix it then but I kept the old (buckled) wheel as a spare.
About 2 months ago I thought I would attempt to unbuckling it (nothing to lose). As the buckling was quite severe I decided to just try unbuckling about 80-90% of the way and then just leave it to settle. This seems to have worked as when I got it out today it was quite easy to do the remaining unbuckling. I also managed to true for roundness (which I find more difficult). It's not perfect but it is good enough.
I put this replacement wheel on my sons bike and switched the
freewheel from the old wheel to the replacement. I also had to
dish the wheel slightly (+1/2 turn LHS, -1/2 turn RHS, on all spokes seemed to do the trick) then re-true.
I took the bike it for a test ride and realised I had made a bit of a schoolboy error. I had not reset the limit screws on the derailleur and readjusted the gears. When I changed into 1st the chain came off and got jammed between the spokes. Cue lots of curse words and black grease all over my hands trying to yank the chain out from between the spokes and the freewheel.
I dragged it back home and put in on the bike stand. I will finish it off it this evening. Time for a
nice cup of tea and a sit down ...