My buddy has a cyclone and I have a Pro 4. We use fairly similar setups and use the same tire setup (Sorex 36 + Hara Black + speedmind rims + Paragon). I have noticed that his car makes the tires "squeal" during cornering whereas mine only makes quite a soft squeal. I am a novice to rubber tires and I am wondering whether the sound of the tires indicates anything, both our cars are similar quickness, but I suspect his may be "using" the tires better..............