Talked to the people at Suspension Tech re 12 vs 13 inch shocks for my 2009 fltrse3. They cautioned against putting 13 on the back without raising the front.
I was thinking about the Progressive monotube for the front end. I don't know what part I would need to raise the front.
I don't understand the geometry in putting higher in the back and leaving the front the same. Can anyone explain why this is not a good idea.
All I know is something has got to change for me to enjoy this bike.
I would suggest you verify the height of your SERG. I don't think that bike has the lowering kit on it and I've been told by 2 different sources that the front is actually standard height of 13", therefore no problem with 13" rear shocks. I currently have 13" progressives and they have no bad effect on the front end, just not happy with their performance on the back. Some people think that because it is a CVO that it automatically has been lowered. Not always the case.
There are forum members MUCH more knowledgeable on this topic than me, but I really think Suspension Technologies mis-spoke, and shame on them for not doing more research as they may have lost a sale. Your HD dealer should be able to verify immediately.
Good luck, and know what you mean. Stock shocks have to go.