I had just bought a set of tyres for the sx with all 4 being 235/40 in the bridgestone re540's. They are not the nicest to drive on the road because they are rough, noisy and feel heavy to steer with, but being a competition tyre i expected that, and i was after one thing and one thing only and that was grip. And oh my, they grip the road like nothing i have ever experienced. Amazing. Just seeing what you guys were using as a track tyre and what you views on them were as far as grip and wear and general value for money. Has anyone used the yoky advans, p-zero corsa's or falken azenis???