I stopped at walmart today to see what I had for tire options. I want to replace my over aggresive hardcore mt bike tires with some thing a little more suited to roads (my bike has not seen the trails in years and was resurrected for my motor bike project) I found myself trying to decide between three different tires, and if I stop at an actual bike shop the situation is worse. what is the prevailing wisdom on tires and treads as they relate to MB's?