You're not on crack; the science is in the circumference.
Yep, make sure the rear end has the same sizes if you have to go there.

Yeah, the drive home would suck; it would be like giving a plane constant rudder in winds to keep it straight. <img src="/forums/images/graemlins/cyclops.gif" alt="" /> In the dirt/mud, it'll be more forgiving. KEEP YOUR SPEED DOWN. <img src="/forums/images/graemlins/shame.gif" alt="" /> <img src="/forums/images/graemlins/shame.gif" alt="" />

I've got 31x10.50's to put under Blackie, but the spare is a 31x9.50, as it's still mounted underneath.

Hope ya checked the air in that thing and have all your jack tools; the '99 4R I bought last summer was missing a piece; had to go visit the dealer. <img src="/forums/images/graemlins/baby.gif" alt="" />