I would of thought that a standard axle length for a single chain ring would do it - go to a good bike shop that sells single speed bicycles. Also one thing to bear in mind is that you can get spacers for your fixed sprocket - to move it out - but this will not help in the other direction of course.
I would of thought that a standard axle length for a single chain ring would do it - go to a good bike shop that sells single speed bicycles. Also one thing to bear in mind is that you can get spacers for your fixed sprocket - to move it out - but this will not help in the other direction of course.