1. What are the highest end derailleurs available for an 8-speed bike? Is Alivio the highest end front derailleur available for an 8-speed bike from Shimano?
2. On Shimano's website, it states that the Deore front/rear derailleurs are only compatible with 9-speed bikes, but I have a Deore rear derailleur on one of my 8-speed bikes (it came stock). Can someone please explain this discrepancy?