Originally Posted by davison0976
If you need a spacer wider than 1.5" the width of the tire you are planning to run requires at least an 8" wheel, while stock is 7.5".
Spacers are not only used with stock wheels. I bought them to run 40s on Walker Evans beadlock wheels that had 4.5" backspacing so that I could turn my jeep without rubbing the paint off the frame.
Many larger/wider tires for 17" wheels that are run on a JK are stiff, load range D and E tires designed for full size trucks that weigh 1500-2000+ lbs more than a JK. As a result, they have to be run at much lower than max psi levels to get a flat tread pattern. As a result, many people with 7.5" wide wheels get relatively long life, with flat treadwear--even out of a 12.50" wide tire.
Most who run spacers with stock wheels do so to be able to run a taller tire that is 11.5"-12.50" wide.
You have so few posts here.
Why not tell us about your background, who you work for, your experience with jeeps, etc.?
Your initial post in this thread as glowing praise for RC and mocking Spidertrax, followed by some engineering observations, etc., begs the question.
FYI, although RC spacers are hubcentric now, for years they sold non-hubcentric spacers that they told everyone worked great.