hey i currently have a motorized 26" mountain bike with front suspension and have a shift kit too. and want to go faster.i can hit 36 mph flat ground now after discovering, how wearing non baggy clothes, and being as aerodynamic as can be, makes you faster. that being said i am considering switching to slick tires or maybe semi slicks to gain some speed. im planning on getting a full slick tire for the rear but not too sure on the front, i ride 15 miles monday thru thursday to work and back on nice paved roads so slicks would be the ideal choice but i also like to ride some dirt trails on weekends sometimes. not crazy trails, but more like dirt road trails for horsback riding and hiking. so what should i get on the front? i would get full slick but then i wouldnt feel safe on the dirt trails, so im left with semi slick/knobby tires and getting SOME speed benefits with some grip or full on knobby tires which i am running now, and loosing rolling resistance but great grip offroad. what are your opinions?