I am thinking about doing the XC race this year, but I am not sure that I have the right tire setup. Currently I am sporting a Kenda Karma 2.0 up front and a Schwalbe racing ralph in the rear. I like the Ralph a great deal but I am not sure either tire will be good for the rough trail. I have never ridden the trail but plant to try to do so before the race. Any suggestions? Since it is a race with a ton of climbing in the begining, I would like something on the lighter side.