Re: Meet the Scorpion (Uphill's Build-Up)
I'm just adding a bit on tire balancing because it seems to come up on the Forum a lot. So this is a re-post with some amplification:
MIR207 did the research and he's right on the money. Anything larger than a 33 inch tire will rub on full compression with a 3" lift or suspension that raises the FJ 3 inches above stock. I run 34's (Nitto TG 305/70R17) and they rub even after chopping everything I can chop.
YOU MUST HAVE YOUR LARGE AFTERMARKET TIRES DYNAMICALLY BALANCED
When were they manufactured? The date is on the sidewall by week of the year and year (for example 2607 would mean the tire was made in the twenty-sixth week of 2007)
The older the tire is from the mfg date the greater the chance that you'll have conicity problems (the tire isn't quite round). Some tire manufacturers have problems with their tires when they're NEW but Nitto isn't one of those brands.
When a tire is mounted onto the wheel, two slightly imperfect units are joined to form an assembly weighing forty pounds for the average car or 115 pounds for my Nittos with the WE wheels.
The chances of this assembly having absolutely precise weight distribution about its radial and lateral centers are virtually impossible. Remember that all it takes is half an ounce of uneven weight distribution for a vibration to be felt. The illustration below shows how an imbalance creates vibration.
The static imbalance creates a hop or vertical vibration. The dynamic imbalance creates a side-to-side or wobbling vibration. Most assemblies have both types of imbalance, and require dynamic balancing (commonly referred to as spin balancing) to create even weight distribution. The balancing system directs a technician to place counter weights on the rim's outer surface to offset the imbalance. When the balancing system tests for virtually perfect weight distribution, the assembly is in balance and will not vibrate. Your tires will ride smoothly and wear evenly (with regard to balance).
J/K 
