Creality 3D Printer POM Wheel Plastic Pulley Linear Bearing for Ender 3/Ender 3 ProEnder 3 V2,CR-7,CR-8,CR-10,CR10S,S4,S5 (Pack of 10)

They do what there meant to do. Good maintenance upgrade if you print a lot you should have a set on hand as the rubber will wear out on the wheels eventually. Easy to install and makes the machine feel new again.

Some of these may be OK, but after swapping the old wheels on my CR10 bed with these, I noticed a distinct catch in when moving the bed by hand (without the belt connected), and it repeats about every 70mm which is the approximate circumference of these 24mm wheels (where they contact the rails is less than 24mm). I winnowed the batch down to the best and the problem is reduced but it is still present. I have read that can be due to several factors, so I will update this review once I am sure of what the problem is.

Item does as explained in the description..

I should have listened to other reviews, all of these wheels have poor bearings that cause periodic error on Bed Visualizer. About 2mm from peak to peak, which makes printing impossible because you cannot get a decent first layer even with bilinear mesh turned on. Worthless wheels. Can’t use them.

Great

The pieces is not centered. All pieces wobbles. I buy to change the ones in the table of my ender 3 pro but is useless cause y cannot even level it because the wobbles in the pieces.

Has to replace a few old wheels that kept locking up on my ender 3 and these worked perfect

I bought these to replace a damaged wheel on my Ender 3 Y axis but they are so off alignment that the bed moves up and down about a 1mm.

I hate to say it but Ive finally found an official product from creality that isnt top quality. When I installed these to replace my worn ones (hadnt used that certain printer for along time and 2 of them got flat sides) and when i installed my first two, then four, then six, they all seemed to be not completely round. They seemed to cause wobbles/binding but luckily number 7 and 8 worked well and its been good ever since. I might recommend the clear ones better but not sure yet. Bought those and will update this is they are a much higher quality than these.