Originally Posted by phljeeper (Post 4213698)

I have a 2015 two door with 2.5" Rock Krawler max travel with 35" trail grapplers. Rides great at city speeds and on the highway up to about 65. At 70 I get a shimmy. It feels like a tire balance issue but I have just had them re balanced and all good. Thoughts on what to check next?

Originally Posted by Biginboca (Post 4213725)

Swap your front and rear tires. If the shimmy changes then you know it's the wheels/tires. If it doesn't you need to look at driveline and steering. In my experience any speed sensitive shimmy or wobble has always been a tire/wheel issue

Originally Posted by kjeeper10 (Post 4213734)

X2 (10 char)

Originally Posted by phljeeper (Post 4213698)

I have a 2015 two door with 2.5" Rock Krawler max travel with 35" trail grapplers. Rides great at city speeds and on the highway up to about 65. At 70 I get a shimmy. It feels like a tire balance issue but I have just had them re balanced and all good. Thoughts on what to check next?

Originally Posted by Smudgeontheglass (Post 4213890)

I have a 2012 two door with a 2.5" Rubicon Express lift with 35" trail grapplers. I didn't have castor correction when I first lifted the Jeep but it drove perfectly fine with the stock BFG KOs. When I upgraded to a used set of the Nittos it had a very noticable wobble at around 70-80km/h. I upgraded my track bars to Adjustable JKS track bars and that helped a lot with the "flighty" steering feeling but I still had the same wobble. I did a 5 tire rotation and had no change in the wobble at that speed. This spring I got gussets and a truss installed and to save some cash on the alignment I got some RE Geometry correction brackets. That moved my castor back to the 5-6 range and corrected the wobble problem completely. I will eventually get better control arms but for now the brackets help a lot.