Do all road cassettes need the ring around the base of the freehub?
Got a Rival rear derailleur, 11-25 cassettte...I was swapping stuff around on different wheels and can't remember if there was a ring/spacer around the base of one of the wheels' freehubs...can't get the chain onto the smallest cog now and the rear derailleur is quite close to the spokes...BLEH.