PHEV Newbie - do you have the Michelin Cross Climate 2's or the Michelin Cross Climate +?. From what I understand the compound on the 2s are a little more dense and last 10,000 more miles than the +s. I specifically choose the 2s for the extended mileage on the tire. Not sure of the road noise between these versions of the Michelin tires but again, noise level is subjective for so many reasons. So far, I am impressed with these tires so far.