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I actually put the rears on the front just to try it out. It almost bolted up. A small 1/8"-1/4" slip on spacer is probably all that is needed. Not the safest thing in the world, and may even want to put a drop of thread lock on the lugs to help hold as you will reduce the threads holding. But they looked like they would fit okay.
Think it was just the brake caliper hitting the spokes IIRC. Other wise it looked like the suspension and what not all cleared the inner part of the tire.