I spoke to several local retailers that sold the Westin line. Seeing them in person was great. I was able to compare the 4" to the 5" and see that the 4" provided plenty of width.
After seeing some 6" steps, I knew I didn't want that much width.
With the 4", if you stand at the front or rear of the truck and look down the side, the outside edge of the bar is pretty much in line with the outside edge of my truck's fender flares. They don't stick out at all.
I haven't seen a set of the 5" steps on truck in person. I'm sure they'd look great too.
My wife (ultimate critic) likes the 4" so I'm good to go!
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