How to create a smoothie making human powered bike blender for less than $25

Step 8 Attach Friction wheel.

Using the hammer, pound the 2 tee nuts into the 2 1.5 in wheels. Then thread them onto the long bolt.
It is important to thread them so that the tee nuts are on the outside, not in between the 2 wheels. Otherwise the wheels could fall of, even though the nuts stayed in place.

Next cut a 1inch piece of the old bike inner tube. Slip this over the wheel assembly.

Now you have finished the bike blender. All that is left is to install it.