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The actual difference is not a lot when compared to the 1.875" BS 3.5" wheel. But compared to the older style, 1.375" BS wheels, it pulls the tire in almost an inch. Depending upon ride height and tire diameter, there might be inner fender contact at full lock. Easily fixed by adding a little to the steering stops on the LCA's.

Well I bit the bullet and ordered the 15 x 4's with the 2.5 backspace. I had a hell of a time trying to get Summit to price-match-- wouldn't throw in free shipping or charged tax if the other site did... blah blah blah...so not much of a savings. After scouring into the "deep google pages" I found that JC Whitney had a 10% off code and free shipping to boot! Got Summit to finally agree to not only price-match them but beat their price by a whopping $1 !! BTW...I checked my local speed shop, Weld's supplier up here...only $420 plus tax---for one wheel!!! I ended up paying $186 US each--- you guys have no idea how easy you have down there!!