Bike porn

How would that work...? Surely to have as little variation of chainline as possible you want the sprockets as close to eachother as you can (spacers having the opposite effect)

One sprocket with the correct amount of spacers either side to get the chain line right. Save you getting a new wheel if you want to run your geared road bike fixed. Multiple cogs is just an option and could possibly mean bad chain line.

Much better solution :

I have heard there is a bit of take up in these and I don't know if they are up to skidding. Might be wrong.