I've mainly been a M/T guy and have been using them since 2003 when I started to race a car. Around 2005/2006 Goodyear ran a special, buy one tire get one 1/2 off or something like that. So, I bought a set. Worse set of tires I ever had. At the time I never balanced my slicks. I was running 11 lbs of air in the M/T but had to run 8 lbs in the Goodyear as they shook so bad. I was also only racing 1/8th mile at the time. I haven't bought another Goodyear tire since. Around 2011/2012 or so I received a set of M/T that shook some. Since then, I started bubble balancing my slicks and the car is so much smoother. They do take a good bit of weight (I also run tubes).