My data is 4 sets of Atturos on my last two Macans, an S and now Turbo........could not wait to burn thru the OEMs to get the Atturos......I have posted on this before, as have dozens of others........no wrecks, punctures, getting 25-30 k mileage and I drive hard, excellent on wet roads, confident handling, look great w/great tread pattern.......and I have had the 21's on both cars. Order thru SimpleTire w/ free shipping and my Indy mounts them.......they are the best kept secret, (although not a secret anymore) in tire industry. There is no way one person with zero personal experience can offset all the positive personal experiences on this board. Seeing and driving on them is believing!!!!Provide me empirical data from a reputable reviewer on how well the Atturo's perform then, I'll wait.