I have a 1994 Trek 2120.  This is not the one I own but the same bike https://www.******.com/r/bicycling/comments/2tat9b/bought_a_1994_trek_2120_for_100_this_or_my_old/.  I want to get front/back mud guards but I am having trouble determining which ones would fit. I am barely mechanically literate....