they work closer with Jeep then any of the other outfits and several of their engineers came directly from jeep. Hard to beat 5.2" backspacing if it gives you enough clearance for your tires.That's just poorly written. Engineering concepts don't have to be hard to understand. Wikipedia has a much simpler description of Scrub Radius.
Scrub radius - Wikipedia, the free encyclopedia
The question is a good one though. As far as I know, only AEV has specified a rim to use with their lift kits, and they use a 5.2 inch backspacing. Think they know something the others don't?
No crap. I need to read through it a few more times. I googled scrub radius and still seeing a bunch of opinions.I'm licensed to operate the most powerful boiling water nuclear reactor in the world and that was quite confusing to read...
Little late to the party but the last comment is not correct. Geometry brackets have no effect on scrub radius. The brackets lesson CA angles and keep the axle forward centered in the well. I'm still trying to grasp this whole thing on scrub radius. One thing I noticed in your vid .. The relation of toe to scrub radius. How the tires toe out with positive SR and in with a negative SR. Now we mostly push our SR out With less back spaced wheels or spacer. (Tires would toe out)This was very educational and led me to research further. I found this video which pretty easy to understand and did a good job illustrating it. Essentially anything that moves the intersection of the tire centerline and the king pin centerline away from the surface plane (road) will cause a positive or negative scrub. This is undesirable. The goal is to have it intersect at the road surface. http://www.dailymotion.com/video/xyr12q_scrub-radius_auto This is why changing suspension with lifts or changing tire size or back spacing has effects on handling. Also why AEV made the geometry correction brackets.
No crap. I need to read through it a few more times. I googled scrub radius and still seeing a bunch of opinions.
Some say tire diameter as a affect, others don't.
Positive/negative good bad, wtf ? Confusing as hell.