thanks krusty, that makes a lot of sense =D. and operator, sorry, im slow this week, permafried for a few days now. dont get me wrong, I would totally spring for one of those blinged out ridiculously hard golden japanese cogs (bike porn, from ways back) if I could afford it, because I love well machined objects, but at the same time it made me wonder if theres any real reason besides bling. now I know.

just looking at the 15t cog from my twenty, with its long wideass teeth, older than I am and still barely worn.