Review on Optimized Plastic Bearing for Creality 3D Printer by Josue Porter

I have bought these wheels 4 times. Of the 40 bikes I bought, 9 were good, meaning less than 10% are actually usable. I have a homemade wheel tester to confirm their quality, but there is a visible difference between good/genuine wheels and wobbly/poor wheels. I've added a photo to show the difference. Left wheel is good, right wheel is bad. You can see lighter/more reflective metal inside the bearing as well as a warmer black color and matte texture on a good wheel. The result of wobbly/poor wheels is that 3D prints will have imperfections like noticeable layer misalignments or poor platform alignment when used on a build plate, even when using Bl-touch or another platform alignment tool. Unfortunately I have no idea where to get OEM disks installed on high quality printers.