oook, so A- im new to serious mountain biking, been doing regular stuff since i was 10 (now 22) but im getting very serious now. some questions i have are... 1: i just got a shimano saint 2 gear crank....do i need a chain guide/tensioner with this for my 9 speed? ad my second, though it may be dumb, i am pretty fresh....how the heck do you tell if your wheels are alittle out of true?? i feel something but really cant put my finger on it. anyhelp would be great. thanks guys!!!!!! and if you have any questions, please, ask