Go to the hardware store and buy about 20-some feet of flat-linked ornamental brass chain, cut it into 3-1/2 or 4 foot lengths dependin on your wheel size, then wrap it around the rim and tire - securing it with small S-hooks.
Viola!, moped tire chains.
The soft brass won't chew up your tires, although it may scratch the paint some on mag wheels, and digs in quite nicely....the downside is that they only last about 3 days worth of riding, especially if yer a throttle gorilla like me.
(ungh! fasta, fasta !)
(PS. ya buy 20-some feet so you have spare lengths, which you should carry on you in case of one of them mounted on the moped snaps.)