I dont understand why some people actually convert to single speed or fixed gear. I'm not bashing in anyways, I just cannot see any enjoyment having one speed to deal with. I am a shifter junky, and in forest trails I am constantly clicking away at the shifters. I don't like having to get off my seat to pedal, I like to try and keep the same pedaling pace through out my run. I recently read that some people convert their mountain bikes to fixed gear. That boggles my mind even more. Having all my gears allows me to use my bike on road and in trail, it allows me to climb up hills with ease and yet I can still go fast when I want to. Also it seems that a lot of 29er bikes are built with single speeds!. I so don't understand. I saw a video on youtube of a guy climbing a rather mild hill and the camera man is saying "feel the 29er pain!!!" It looked so hard for the rider. I grew up with hand me down bikes, bikes either to big, 1 speed, etc.. (x-mart bikes), and seeing the guy with the 29er, reminded me of the horrors I went through with the bikes I grew up with. I really am curious to know some of the benefits of single speed and fixed gear other then simplicity and cost.