Hey Ikkin,
how tall are you? I know nothing about mtb sizing (nor Trek's 2002 wsd sizing...) but I've sort of been wanting to try mtbing, but not ready to make a big investment (I might be able to swing $150 though ). I'm 5'6", longish torso, 31.5/32" inseam. I'm guessing I'd more likely be a medium, but let me know if you think it might fit.