Are you running 1/8" cogs/rings? 3/32" chains really don't run at all on a 1/8" cogs - it forces the teeth up into the space that is clear for a 3/32 wide face against the bushing, and can load the sideplates and push them off the pins, basically forcing the chain to fail in a "snapping" type of failure. Most track cogs, etc... are 3/32" width. You can run a 1/8" BMX-width chain on a narrower cog - no problem, potential "slop" but usually not a big issue. 1/8" cogs/chains will tend to wear longer, as there is more face on the tooth for the load to be distributed over. While I like SRAM products for multi-speed, I think I prefer KMC's chains for SS - using a 1/8" system. If I had a 3/32" gear/cog, I would likely run an 8-spd SRAM. I went though a non-nickel PC-1 in about 5 weeks recently - was not happy. My KMC (OEM) chain was a year old and still within limits - I replaced it as a preventative maintenance thing. Went back to KMC last week after breaking the bushings on a PC-1.
