man, i love how i just started a new vintage trek lovers forum. it is making me feel apart of a new generation of bike enthusiasts. anyway, i have another question about my conversion. i am thinking about purchasing a new rear wheel or wheel set because the stuff on there now is pretty rusty. what do you guys think about that? what do you suggest i get (new hubs, new rear wheel, entire set? what brands etc.). also, can anyone suggest a design gear ratio for me, being a newb and never owning or riding a fixed gear? again, the bike i am converting is a trek 560.