Scooter 3spd Chainsaw Belt drive

Step 3 Modify the plastic scooter wheel

This is where you will cut out the center of the hub of the wheel where you slide the hub into. Its been so long don't remember exactly how I did this. But, I think I put a narrow milling bit into my drill press and mount the wheel to the drill press table horizontally, and a bit off center, so that you can spin the wheel manually, and cut the inner diameter a little at a time. The diameter depends on how thick the 3-spd hub is. After the inside is cut out of the hub using plastic/ steel epoxy coated on both the plastic wheel and the 3-spd hub, slide the hub into the wheel and wipe off the excess, and then put it back into the drill press base horizontally, and slowly spin it, and tap where needed to balance it, so there isn't any wobble. Let set to dry.
On another note, you can also use one of the rear wheels thats on one of those childs 12" wheels. (little bikes) The custom pulley I make in the next step will work on either. Something happened to the milled wheel and will let you know what, later down in detail. Note the tire is not one of those knobby tires that are usually found on these push scooters. This tire is a low profile treaded tire that holds more air, and does not sway into turns. The knobby tires are taller and will sway and sometimes pop of the rim under heavy loads and higher speeds. The tires I bought can be found at some high end bicycle stores but only cost about $15. They are called Impac tires 12 1/2 x 1.75 .