The diameter of your 255/30-20 front tire is 0.3" larger in diameter than the stock 245/35-19 front tire. This increase in diameter has caused rubbing on the front fender liner of some cars when the steering wheel is at full lock.
Where is the front rubbing? How badly is it rubbing?
Not sure about DPE but some forged/custom wheel manufactures stamp the wheel width and offset on the wheel mounting face - have you checked to see if there's a serial number as well as the width/offset stamped on each wheel?