Just my thoughts, but wheel spacers are not inherently bad things (a slip-on rotor is a spacer if you think about it), however there are limits to that line of reasoning. I agree with Justin that spacers up to 1/2" thick are not the end of the world, just be sure to use a good quality 6061 aluminum spacer, not some piece of junk, universal, die-cast unit that practically cracks when you just look sideways at it. If you are running spacers, you should also seriously consider upgrading to larger wheel studs as they will allow higher lug nut torque specifications and therefore greater contact pressures between the wheel and hub (thorugh the spacers, rotor, etc).
Well designed adapters are good solutions for applications that require 1" or thicker spacers. The key word there is "well designed" as there are a lot of junk ones out there for cheap...and you get what you pay for in my experience. You can make slightly thinner adapters in some instances, 7/8" isn't out of the question, but you start to run out of room for the internal set of lug nuts.
The 1/2" to 1" range is sort of a no man's land for spacers/adapters, so avoid it if you can IMO.
Tobin
KORE3
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