Had mine at 140 mph and I had quite a bit more pedal had I wanted to stay in it , the Xfire tracked like it was glued to the pavement. Im running Michelin Pilot Sport rubber on Detata polished wheels and the rubber seems to really grip/grab the pavement. I try not to spin my wheels although on occassion it happens when I'm starting from a dead stop and have it in 2nd. or 1st and hard accelerating to get on a heavily traveled State hwy.sometimes they spin but only for a brief second or two. I'm not into high speed, I bought this vehicle cause it is a 2 seater sports car, had I wanted a race car I could of bought one. One problem I'm running in to is every young punk in his 5.0 Mustang wants to race me. Little do they realize this little 6 cyl. can probably smoke the 5.0 V8 Mustang but I'm not going to be the guinnie pig... Had a Ford Escort all dolled up with spoiler and the ground effects roll up beside me the other morning at 5:30 am, he kept racing his motor and challanging him. I turned my interior light on and waved to him my middle finger. This guy really wanted me to run him but I wasnt going to, I didnt want to blow away a 4 cyl. Escort and make him feel like a dumbass instead I waived the middle finger to him and that pissed him off and he took off like spitting and spuddering, his POS even backfired a couple of times....