This is a great thread. I've not followed the bike world much the last 10 years, just biked the same bike and left it at that. Now the kids are gone and I'm into this SS thing I've wanted to try since the 80's. My MTB is set up with a 16t freewheel and 42t single crankset (68 inches). The crank was from eBay, a new Shimano tandem Captian's side. It was modified by re-taping the pedal threads so it could be flipped and used as a standard single crank. I've not read up Sheldon Brown on this yet but what's the basics on 1/8" components, differences from 3/32 other than the obvious chain size? Now I'm not sure if all my parts are 1/8 or 3/32. And can someone clarify the rounder thing? I assume the larger the cog & chainring, the rounder they are, am I correct? Would my 42 and 16 be considered a good biggest round combo?

Maybe this should be a seperate thread, but you all know your stuff here! I've built and messed with bikes since the 70's, just need to come up to speed on the current stuff.!