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

Step 9 Fit the blender to the rack

Set the blender assembly on your bike rack so that the friction wheel sits on the left side of the tire. If you put it on the right side, the blender will spin counter-clockwise and unscrew itself.

Now you need to adjust the friction wheel so that it sits on the back tire correctly. Optimally, both 1.5" wheels should be touching the tire at all times (see photo).