Who knows anything about single speeds? I want to build up my old '96 Mongoose IBOC Pro-SX frame into a single speed. I plan on using a Blackspire Mono Veloce 34T 110mm front ring (using my old RF Turbine LP 110/74 cranks), a Kick Ass Cog and Fibonacci Spacer Kit (using my old White Industries Ti wheelset), a SRAM 8sp (should I go 9sp?) chain, and a chain tensioner mounted at the derailleur hanger. I want a good chain tensioner that pushes the chain up, but I don't want to spend an arm and a leg. However, in the world of chain tensioners, I don't really know what an arm and a leg equates to. Do I want a tensioner with a spring or one that holds tight? Any suggestions on tensioners?