I have tried tires with and without. The tires with are ready to go and indeed wear MUCH better. The increased durability is real and noticeable. My two year old front Cup 2’s have been flat amazing with how durable they have been. The tires I am removing have about 25% thread remaining, but feel like they have been “cycled” too many times now. They have served me for several years! They show a great deal of evidence of spinning from my last time out at the big track when we were checking out the “tune”. They were challenged even at over 100 mph. I want more and fresh traction.
