thanks. my mag trainer has 5 gears, but i guess i'll try keeping it at a mid range and using my own gears on the bike. the rear tire cannot be as easy as the front. my front tire has aquick change lever. and the back tire i need to worry about the chain and derailer. So that is the scary part for me. if i did it a few times at a Bike shop, i'd feel better about it.. so if i can find a good bike shop, i'll see if they'll help me out. in the meantime, i bought a book on repairing bikes, it is coming from Amazon. my trainer cost me about $109, plus tax and shipping came to a total of About $139. My Bike cost $135. So i bought the cheaper stuff, but the mag trainer seems pretty good for a cheap one. and it is not very loud.