Cart Wheel Riser

I got a wheeled cart to hold my printer only to find that even with locking the wheels it still shifted quite a bit. I made this part to have the wheels sit inside and sturdy the cart. You will not be able to roll the cart with this on but the wheel will no longer shift causing the cart to shake!

The wheels on my cart were 50mm radius. Its hard to see in the image but the inside is shsped to match the wheel and hold it in place. Feel free to modify it to your needs!