So the front brake calipers are larger (big surprise right) thus the clearances are less.
Minimum clearance from the caliper to the wheel is about 1/4"
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The distance from the hub face the wheel bolts to out to the caliper is about 3/4", the hub face is inset from the caliper.
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The brakes have about 4500 miles on them so they are practically new. I didn't measure the rear brakes because the front ones will be the critical dimensions but if you need them let me know.
Anyone got some stock wheels laying around already dismounted that they can throw a square on and take a measurement like SA has done here. Need the distance from the mounting pad to the inside of the spoke. According to SA's measurements, that should be right about 1". Can anyone confirm?
I'm going to look at the wheels here tomorrow. Still not sure I want to get the 18"x9.5" ET38 and mill the mounting pads (if there's room) or if I should play it safer and get 18x8.5 ET35 and have them widened if I decide to do so later on down the road.