[Sportstick]

The Primacy3 ZP were installed today. Of course, they need a break-in period, but from some highway and city traffic, I'm already sold that these are the best replacement run-flat tires for our 18" size. The car now glides where it previously "sandpapered" its way down the road with the original harsh and noisy Pirellis. Bumps feel far more isolated. The reviews for DriveGuard have been mediocre, not great. These are far better to my senses. The 225/50-18 size is hard to find. Tire Rack carries the Primacy3 ZP, but not in that size. Another tire store in my area confused them with the non-runflat which Michelin has named the same...just Primacy3. Then, realized they couldn't get the ZP version. Very odd wholesale distribution pattern. Discount Tire was able to order them. First day, but very, very pleased.

EDIT: My wife even noticed and she never notices anything about cars. She said the car felt smoother to her as a passenger!