treadmill motor ebike

Hello, I have been trying to make an ebike with a treadmill motor, but I cannot find a threaded sprocket for my motor. Could you help me find one or give me another way to use my motor to move the bike. Thank you.
Motor Technical details:
95vdc
21.4amps
2.65hp
Sprocket attachment diameter: 12 millimeters

Can you post a picture?

a 12mm shaft sprocket for bicycle chain isn't going very common. and if you find it, it will likely be designed for low RPM D shafts, or Keyed shafts.
A treadmill motor is rated for around 6000-7000 RPM. If you want to get it down to the 200 to 400 RPM a bike tire needs, you're going to need a multi stage reduction. For the high speed side, it's best to leave the belt on, as it will run smoother.

I'd cut the flywheel off the treadmill's original belt sprocket (if it's one piece), then use that belt stuff as the first stage of reduction. Then drive a chain with that.

See my old http://electricle.blogspot.com for one possible way to do that, in the treadmill motor posts.

Here is the troublesome motor and it's flywheel.
How would I go about doing a "multi-stage reduction" ?

Hey, I have a threaded 95vdc, 21.4amps, 2.65hp treadmill motor and have come across the issue of converting my 6000-7000 rpms to 200-400 to get the motor to run an ebike (my motor is: P.M. D.C. motor model c3354b3025). I saw that many of the other bikes have sprocket-chain rpm reduction, but every option is home done or comes in a kit with a specific motor. I have found a model on http://www.electricycle.com/ that explains the process well, but unfortunately I live in the northeast of USA and the stores that this person used are centered around texas. What should I do?