My car came equipped with the new PNCS model and recently I was complaining to my service director at McLaren that I was experiencing some wheel shake at high speed that felt like a wheel balancing issue. We discovered that the foam used to carry out the noise cancellation (spread as foam blocks inside the tire) is coming loose and bunching up effectively causing a wheel balancing issue. The shearing tends to happen after track sessions or on very hot days when the tire temps are high. I witnessed another tire yesterday while at McLaren where you can clearly see bunched up foam in one part of the inner tire.

As an aside I've tried 2 570s one with PNCS and one without, and I couldn't really hear the difference, but I'll bring a decibel meter next time.

Is anyone else running these latest Pirellis with PNCS experiencing the same issue?