Bicycle Axle

Do I need to get more axle and what would be the form of pulley on the axle?

Ask a Trek dealer and see if you can order one of the pulleys made for the new drive belt Trek bike is sold. Work best for what you want, and perhaps buy the belts too.

pulley for what?

Does turning the wheel?
or does the wheel turn the pulley?

If so he won, t work

What do you do?

WLE

Is pulley here means the rear derailleur (RD)?
If some RDS can be mounted directly on the axle so that most CDs are mounted on the bike frame itself.

You'd be better off investing the bike on a trainer and the rear tire to drive a shaft with a pulley on it. You can also remove the tire and the room and use the rim of a pulley.


Edit:
I want to mount an engine kits get one engine to a bicycle. The kit comes with a pulley that grinds on the left side of the wheel and you will keep the pedals and the transmission line. Check with your Lawes States regarding the regulation on mopeds. Under a certain displacement and maximum speed, you are allowed to ride on the road at 14 or 15 years if you take a test to prove that you know the ruls road.

http://kingsmotorbikes.com/

The axle of a bike is not running, so it is unnecessary to mount a pulley on the axle. The wheel rotates, the turntable rotates, so if you want to use a pulley, it should be mounted on the hub, not the axle