I designed this to increase the durability of my cart's wheels, using the foam tire that came with the cart. It essentially sandwiches the tire using 3 bolts and uses 2 bearings (per wheel) to reduce noise and increase ease of movement.

You will need the following for this project:

• A cart of some sort with 1/4 inch wheel shafts. I used this one:
  https://www.walmart.ca/en/ip/mainstays-deluxe-shopping-cart/6000195942919
• 4 skateboard bearings, I used these (22mm OD, 8mm ID, 7mm width):
  Bones Bearings Bones Reds Precision Skate Bearings
• 6 Bolts - 1/4 inch diameter, 1-1/2 inch long (might be able to use 1 inch long)
• 6 Nuts - 1/4 inch hole diameter, 11mm hex, fit to bolts
• Screwdriver - Robertson (square head) for Bolts
• Hacksaw or manual hand Jigsaw to cut apart old wheels to extract foam tires
• Pliers and/or drill to take off hub cap for old wheels
• Garden wire to use as new hub cap for wheels (just wrap it around the slot on the end of
  the shaft for each wheel)
• Clamps to hold the new tire halves together while you screw the bolts in place as well as
  to fit the bearings in place (alternatively a hammer and a wood block, or a press/drill press
  can be used)
• Appropriate safety gear (for cutting/drilling etc.)

Note that one half has slots for bolts, while the other has slots for nuts

You will first need to drill into, or pry off the hub cap for each wheel and remove the clip that holds it in place. Once you have the wheel off cut the spokes using a hack saw or manual jig saw. This can be done by removing the blade and feeding it through the spoke hole, then reconnecting it, should you have a U shaped hack saw or jig saw. Go around the wheel, cutting each spoke, then carefully cut the edge of the plastic wheel in two places across from each other so that you can remove the rim, leaving only the foam tire.

Print 2 of each of the half wheels and use clamps, or a hammer and a wood block or press/drill press to seat the bearings in place.

Place one pair of the half wheels around the tire, using bolts the align the holes. Use clamps to hold the two halves together and tighten the bolts to their respective nuts, each placed in the appropriate slots to prevent them from moving.

Once you have both wheels finished, place them on the shaft of the cart and use garden wire to hold them in place, similar to the hub cap clip. This can be done by wrapping the wire around the slot in the shaft where the clip was seated and continuing to wrap until it prevents the wheel from falling off. This has worked well for me, but if you feel insecure using this method, you can try designing a clip to replace it, or using a appropriately sized c-clip.

If you liked this, be sure to check out my other cart modification:
https://www.thingiverse.com/thing:3317065

By using this design you agree to not hold me accountable in any way. You agree that you shall not hold me accountable for any losses, to yourself or others, financial or otherwise, should it fail in any way.

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paypal.me/ShrinkRayme
Thanks!