This!

Your options as mentioned are:

1. Limit Steering with washers

2. Swap to lower control arms bent for tire clearance (synergy, etc)

3. Wheel spacers

4. Smaller tires (Heck no!)

Personally I like the arm swap best because it's $250ish so cost the same as spacers but saves your unit bearings and ball joints a lot of wear and tear

 

Even if he does the arm swap he will still need spacers to keep the tires off the frame assuming he is not adding washers to the stops which to me is stupid. On the trail the more turning radius the better

 

Synergy arms are sweet btw

 

I'm running 4.5" backspace 17"x9" wheels, synergy arms, and 37"x13.5" stt pros and have no frame rubbing with synergy 3" coils. The OP has similar set up with narrower tires so I doubt spacers are needed to keep rubber off the frame in his case.

 

There is no way your tires aren't rubbing the frame at full lock unless you have a full width axle . Are you running spacers? Go take a look at your frame and see if paint has rubbed off

 

It rubbed off with toyo 37x13.5 but they have an actual section width of 14.6". Since I switched to the 13.5" STT which have a section width of 13.3" I have no rubbing. The place where the toyos rubbed is no longer shiny its now rusted, lol. Here's a pic I just took...

 

Remember too that not all 37s are created equal. Depends on what the true measurement is... Some are 36.5" or more and others are closer to 35.5". So that's another reason some might not have rubbing as bad as others.

 

37x12.5x17 Pitbulls definitely rub.

 

I am def not running on the frame - it's the LCA. I know that RK are bent upward for ground clearance and not inward like some of the others. Also, with the kit (and anyone who has adjustable LCAs probably) moves the front axle forward to recenter the axle in the wheel well - this could be avoiding the frame rub.