1/8" chain
1/8" or 3/32" chainring
1/8" or 3/32" cog or freewheel
It will work. As long as the chain's width is equal to or larger than either front or rear teeth, you have nothing to worry about.
I you want it all 'correct', go and swap the freewheel for a 1/8" one. But it will work as is. The cog is thicker, make sure the chain fits that, all will be well.
1/8" chain
1/8" or 3/32" chainring
1/8" or 3/32" cog or freewheel
It will work. As long as the chain's width is equal to or larger than either front or rear teeth, you have nothing to worry about.
I you want it all 'correct', go and swap the freewheel for a 1/8" one. But it will work as is. The cog is thicker, make sure the chain fits that, all will be well.