Originally Posted by
DRietz
Hm. That's interesting. Adjusting the rear derailleur H screw is what should eliminate that, but if adjustment of that doesn't work, it's probably your chain width. Maybe a newer, modern chain would work out. However, I've never had that problem, only read about it on Park Tool.
http://www.parktool.com/repair/readhowto.asp?id=64
Well, I can adjust the H screw, effectively locking out the outermost cog, but then I can't get enough gear to take advantage of all 8 on the rear... Perhaps the chain is too wide, I really don't know. I'll try changing out the chain with another one and post a pic for you!