Originally Posted by
Kontact
This is 99% going to be 10mm threaded axle, commonly available at most bike shops for $5..
IME the cones will be worn enough to make proper adjustment impossible, at least on the drive side.
Originally Posted by
Kontact
Overall, this is an inexpensive bike. It isn't necessarily throwing good money after bad, but is there really any reason to upgrade it?
Replacing a broken axle and a worn freewheel is just maintenance. Keep the bike going until it is time to sell it and get a better one.
If you're going to buy new bits you might as well buy bits that will work properly. I'm biased because I've broken or bent most of the non-freehub rear axles I've owned, and I enjoy building wheels. But I'm also inclined to use stuff that's "good enough", and if it ain't broke don't fix it. :-)