Originally Posted by
WeirdOddity
http://sheldonbrown.com/fixed-conversion.html
Here is useful site for beginners. Please note that to turn your mtb into a SW33T FIXAY you will end up replacing the following parts with fixed/singlespeed specific parts
- rear wheel and hub
- crank
Most conversions will run you at least $100, assuming that your frame is compatible and that your parts are in good condition, which they are not.
You almost never need a crank, just a new set of chainring bolts. You will find some trouble finding an appropriate rear wheel; most fixed gear wheels are 700c, while chances are very strong that your mountain bike is a 26 inch wheel. Converting it to fixed will be more expensive, because there is a decent chance you'll have to have a custom wheel made, but fixed mountain bikes with large, slick tires are awesome bikes.