Please note, the bike is sold as a single speed. If you want to use it as a fixie, it has a flip/flop compatible rear hub. To switch to fixie mode, you need to buy the screw-on fixed cog (24 TPI threading, 1.37" diameter, standard) and the locknut (24 TPI, 1.29" diameter). Then turn the wheel. You can get these spare parts on our website, or in stores at one of our workshops.