So I'm going to build up a new set o' wheels, and I figure I'll start with a new chain and cog. On my beater fixie, I have been running $9 KMC BMX chains but those things stretch fast and, even though I'm farily meticulous about chain cleanliness and chain lubing, I still have to readjust chain tension every 45-50 miles, and change the chain after ever 600 miles or so. I was thinking it was high time for me to get something that will go more miles without too much stretching. Since I'm going to get a new cog, I could go with 1/8" or 3/32".. I don't care, I just want whats going to last the longest. I have no experience with legitimate track chains, and I imagine the best ones are built with strength in mind rather than stretch resistance ( I could be wrong). Just wondering if any of you have been noting how many miles you are getting out of your chain..and what chain.