I own a 2005 Trek Y26. I want to go 9 speed in the rear. What will i have to buy? How much money am i gonna have to spend? Will rims have to go into this? I just want to have an idea of what i have to do. I had a very good time this weekend riding, I finally got the wheel bob down, i had to basically adjust the rear shock to its limit, but it worked. Never had so much fun going downhill! I think im really missing some gears while i go up steep hills though. Let me know. Also where should i start on getting the weight on this bike down? Im beginning to really like this whole parts catalog thing hahaha!