Rc 4.5 x-flex adjustable control arms. Before the lift wheelbase was 102" now that the lift is done the wheelbase is 100". I set the lengths of the control arms to the installation manual specs. How much does this affect tire wear? It drives very similar now that its done but I don't want to mess up my new tires

 

If your alignment is OK tire wear should be OK, a slight change in wheelbase shouldn't hurt anything. I'm curious why it changed 2" though. I assume the front moved back a bit?

 

This would be a question for the Advance Cherokee section, But the answer to your question is, Your castor wont be stock setting, I'm not sure off the top of my head but look it up. And your tow should be 1/16th of a inch in. Drive your jeep a while and just watch daily for un-even ware.