As you may know, i have only 1 MTB right now. I ride it everywhere an everyyear, but am considering XC races this year. Eventually (upon the arrival of my urban/dirtjump bike) It will only be used for XC. My question is should i be concerned about weight? It is weighing around 30lbs right now, is that too much? What should i consider changing in order to bring the weight down the most?