Replacing chain ring

Are you happy with the 46x18 (69") on your old bike? if so that is the gear to go for. As 790 said chainrings on single speed have a pretty easy life but there is no doubt that different brands can vary in hardness. Also they can vary in the degree of "roundness" Some nasty chainrings can cause the chain to run tight and slack because they are slightly elliptical. Impossible to tell in the shop of course.

Just seen this on the Velosolo website

***Token Track Chainset

A new track chainset from Token with traditional square taper fitting. Forged 7075 aluminium alloy arms with 144mm BCD (compatible with Token chainrings only). Complete with 1/8" 48t CNC 'Shuriken' chainring***
I am at a loss to understand how there can be compatability issues on a track chainset if the BCD is right but maybe it would be best to stick with Miche.

I'm not comfortable with my current ratio of 46/18, It does become abit of a struggle when I try to stop but I suspect that happens with all fixed gears, I do want to downgrade defiantly but I don't know to what. Does that mean that token is only compatible with the token arms?