Re: Fixie with a flip flop hub.
I agree with all above on the dual pull lever, do not link the brakes on a two wheeled vehicle. Find another way to deal with the extra controls. On the fixie wheel subject the 9 hole kit sprockets line up with the teeth on an 18 tooth fixie sprocket and you simply bolt them together. The issue are slightly machining out the center hole AND the motor will be trying to unscrew the sprocket to drive forward. You have to add a little lock tight beat it on ridiculously tight and do the same to the lock ring and it will hold with no problems. It is a pain to swap sprockets later though.