I switched my cassette on my Jamis from a 12-26 to a 11-28. My Jamis has 2200 8 speed shifters, 2200 FD and 5600 105 RD. When I changed the cassette I knew I would need to add a few links. I tried the 12-26 chain just to see what would happen and it was a mess. I had a new chain, so I cut it like the 12-26 but with 2 more links. The shifting is fine on the 28 side of the cassette, but once you get to the middle the RD skips gears like crazy and it seems like I am always in between gears in the middle of the cassette on to the 11. Do I need to add more links, or does the RD simply need adjustment for the 11-28? Yes, the 11-28 casssette is an 8 speed like the 12-26.