option 2.
1.5mm of cog spacers should'nt be a problem (you can use BB spacers), just make sure the lockring still threads on nicely. http://www.velosolo.co.uk/shoptrack.html
(ED: I've got 2x1mm spacers on my fixed, and the lockring still does enough turns)
option 2.
1.5mm of cog spacers should'nt be a problem (you can use BB spacers), just make sure the lockring still threads on nicely.
http://www.velosolo.co.uk/shoptrack.html
(ED: I've got 2x1mm spacers on my fixed, and the lockring still does enough turns)