From the factory, your caster angle will be set at +4.2° and if you’ve just installed a 3" or taller lift on your Jeep JK Wrangler and are now running 35" tires or bigger, it is recommend that you increase the amount of caster you have to about +6°~7°. More caster will help your Jeep to drive straight, reduce or eliminate any "flightiness" or "dartiness" you might experience and it will even help prevent your ESP from activating.


Then
4inch how to set the long arm running 33 tire？？

thanks so much