I have a 2015 utra limited that I would like to Lower. Can I just install 1 inch shorter shocks in the rear or do I have to lower the front also? what parts do I need to order?

 

I ran lowering blocks on rear for over a year before I lowered the front.

 

From what I know, you can safely lower the rear without lowering the front. What you don't want to do is lower the front without lowering the rear. This will adversely effect stability and create an unsafe handling condition.
I would suggest using shorter shocks or using lowering blocks that lower the bottom of the shock in line with the angle it sits at now verses lowering blocks that swing the bottom of the shock rearward. I had some of the latter and I found they put more front to back pressure on the swingarm bushings and over time the bushings became oblong instead of round.

 

Yes you can do what you said to lower it. My question to you is why do you want to lower it? If its a necessity because of your height then go for it, better yet try a lower profile seat.
If you're doing it just for cosmetic reasons I would warn you that you probably will not like it. My bike was lowered front and rear by the previous owner and I hate how it handles and rides compared to my other baggers. I cant make a turn without dragging hard parts on the ground and it also makes the ride a little harsher. Just my 2 cents.

 

Stock one inch lower shocks are cheap and easy to find.
As far as lowering and not liking the ride.. I dropped my RK front and rear using Axeo's in front and Ohlins in the rear. No complaints at all, Only problem was getting a shorter side stand. I had to fabricate my own wedge to lower the stand as the two lower ones I bought didn't do anything .

 

I did the front and back because i felt it would keep the weight from front to back as intended from the factory, just my , but as others have said, you can just lower the back.

 

I used a LA Choppers kit on the rear to lower 1”. The parts are beefy, good quality stuff. They also maintain the stock shock angle. No issues after three years. I did have to shim out my saddlebag mounts 1/4” for clearance, but no big deal. No problems with that either in three years.

 

I installed these https://www.progressivesuspension.co...tra-low-shocks

My first ride I liked them. But the I have not been 2 up yet. The weather will not cooperate.

 

I lowered mine with Monroe air shocks, rides smoother too

 

Some touring models come from the factory with shorter rear shocks, so it is not necessary to also shorten the front, however ride quality may well suffer and stock full length shocks are bad enough! Much better to avoid reducing height if possible.