I'm used to department store bikes, and now that I have found a couple bike shops, how can I tell before I acquire a tire and put it on, what my ride will be like? I "street and trail" ride mostly (mostly pavement and push roads) and am thinking hard about an easy rolling racing slick or semi-slick. I don't think my roads are quite tight enough to warrant peak grip, nor can I go fast enough to need it on most days. Btw: I like bikes with 26"x2" wheels right now.