The 2003 and 2002 rockhoppers have completely different frames , All of the 2003 model frames are fullly butted (2002 had only the pro model fully butted). Plus the 2003 model has more gussets around the tubes up front. The downtube on 2003 is bioval and the toptupe is round gauge rather than square tapered. As for the specs...i dont know...i live in Europe. US specialized bikes are different. But the new frame is a big improvement over last year.