2 out of 4 original tires had bubbles. I went to Sam's club because the price was right and they offer a limited warranty on their tires. I needed two tires, both on the driver's side. Unfortunately, the 2 new tires were installed on the same side. I was told that this will be ok by the mechanics working at the store, but it's not ok. It's noticeable that the tread isn't the same on the left as is on the right. Unfortunate since 2 tires installed are $900.

Great performance but extremely fragile tires. I have patched or road-hazard replaced more Pirelli PZero tires in the past two years than I have with any other tire in 20 years previous. They tend to respond negatively to anything that might be on the road - potholes, object, debris, etc. - and it costs me a trip to the tire center more often than it should versus other tires.