Nice setup but those tires are whack. I would run them on a trail bike but unless you only hit super smooth trails they are no good. (I speak from experience, I ran that same rear tire for a while but eventually said eff it after the 4th sidewall kasplosion, the AT Xtreme are what I have on my trail bike but they are pretty well useless as far as cornering traction is concerned imho) Now put some real tires on it and weigh it again.My 2010 setup:
Sunn Radical Finest 09"
35.1 lbs (15.93kg)