Yeah saw this for sale on the net there late last year, i'd say yeah defo a 99, made in 98 for a 99 release as serials go....logo changed to this version in 99 also, so yes post-trek...still nice bikes though...I picked up a 97 Attitude race with 96 serials but the race wasn't released until 97 so like yours it was made before that year...would also be considered post trek but was still made in the old factory to the same standards, most notable difference on mine is the head tube when compared to the 96 and earlier Attitudes (no bulge like earlier models)....so defo a 97....had it been made in 96 to the same design as the 96 it would be considered pre-trek even though Trek bought it in 95...I still love it, if I had the money to collect them I would, the nicest bikes I've ever had the pleasure of riding or seeing online, works of art, and pieces of history, I hope I never have to buy another bike unless it's a nice Klein.....happy trailing.