How would I do this? It would be on a lower end frame and has a rigid fork. I don't own the frame yet just curious. I would like ( at least I think I would) to build my own single speed to ride around with my son. We most likely won't do any dirt just yet, he is still a toddler. I know I'd need a chain tensioner and a new crankset and new rear wheel, anything else? What if I just took the shifters off and left the derairuer(sp) in the smallest gear? I normally only ride the dirt but have been thinking about this for awhile now that the boy is getting old enough to do a lap around the block. I saw a low end MTBike at a shop that i absolutely love the color of. What am I looking at getting started? Prices for built mtb singlespeeds are a bit high, although I did see a nice 2006 redline monocog that looked cool. Thanks for taking the time to answer this. Oh, who sells singlespeed conversion parts online? the usual suspects of Jenson, Price Point, etc?