i here so much conflicting information about this subject. i'm running an amc20 and a dana30 on 33's. eventually i'll step up to at least 35's when i can afford a rubicon sping over. it's my understanding that as you go up in tire size it puts more pressure on your axles and it's best to step up your axles. SOME people in my club swear that my current axles will handle the bigger tires with minimum issues. NONE of them wheel a scrambler. i need some SCRAMBLER input !!!