At 30K odometer miles, I was experiencing a wobble on the steering wheel at low and high speeds, so I took my TC in to have wheels/tires/struts checked. Sure enough, front left tire was seriously delaminated. Disgusted, I asked for a price to replace the set of 4. (My spare is already a different make do to a blowout at 17K miles) The store had 2 choices in stock for me, either another set of the same ContiPro set that I had before, or Toyo Ultra. The choice was easy. I have never been happier with the way my TC drives now that I have the Toyos. The price was practically the same. The Toyos are 4-ply like the ContiPros. I would have liked to go to a 6-ply for durability but that was not a ready option. I am pleased to report that my TC now drives better than when brand new. It is much quieter at any speed and the constant vibration at highway speed that I took for granted as part and parcel of the TC experience is simply gone. Plus there is no problem with the tread carrying rocks and gravel which was my pet peeve about the ContiPros from day one. I've put about 500 miles on the Toyo Ultras so far with no complaints. Fully loaded or no load the handling has been great. I've only filled my gas tank once since the switch, so it's too soon to tell what difference if any there is to my MPG. After the next couple of tanks I will average them together and post an update.