4Pcs Bike Ball Bearing Retainer Replacement Mountain Bike Parts 1/4 inch x 9 Balls Bicycle Repair Accessories for Kids/Stretch Bicycle MTB Bicycle Ball Bearings Bike Crank Bottom Bracket

Ones that came with the bike quickly became noisy. These replacements, inexpensive though they are, have just worked flawlessly.

Replaced the shot bearings on a Raleigh Pioneer Metro and they worked spot on.

Working perfectly. 👍

Worked fine and great value, no complaints

quick delivery does the job A+

Cheap but well priced. Quick delivery. Does what was designed for.

Great part, shipped and delivered quickly.

It looks good when you receive it, but sadly it’s not good quality and not stainless. After 18 months, I have opened the bottom bracket and the bearings were very rusty - both the frame and the balls, not great at all. See picture comparing with a new one. It’s probably worth buying a more expensive one.