not sure about the tires, but I believe the wheels are bit over 1900 g. My epic came with the same wheels and some specialized fast trax tires. I changed them over to a paor of custom wheels from Mike Garcia at www.oddsandendos.com and threw on my kenda karmas - lighened the bike up significantly. Of course I'm 145 lbs and do mostly xc racing so be careful going with lighter components for AM riding.
Not sure which SJ you got but if it came with the shimano HG-50 cassette change it out for an XT (the HG-50 is a weight, changing to an xt will save you around 100 g).
Not sure which SJ you got but if it came with the shimano HG-50 cassette change it out for an XT (the HG-50 is a weight, changing to an xt will save you around 100 g).