4 Pack Bike Ball Bearing Retainer Replacement 5/32 Inch X 16 Ball Bearings For Crank And Rear Wheel, Repair Kit For Mountain Bikes And Kids Bicycles, Bicycle Bearing Retainer Set

4-Pack Bike Bearing Retainer Set for Cranks & Hubs
✔️ Includes 4 steel retainers: 37mm OD, 29mm ID, 4mm balls

This bike bearing retainer set is a sturdy steel replacement part designed to secure ball bearings in the crank and rear wheel hubs on mountain bikes and kids' bicycles, helping maintain smooth operation.

✅ Outer Ø 37mm (1.45"), Inner Ø 29mm (1.14"), Ball Ø 4mm (0.16")
✅ Material: steel, color: silver
✅ Pack size: pieces
✅ Easy to install on compatible crank/bottom-bracket assemblies

💡 What is a bicycle ball bearing retainer used for?

This handy piece keeps the tiny bearings seated and spaced, helping crank and bottom bracket perform smoothly.

- Keeps bearings aligned to reduce wear and extend life
- Handy for quick maintenance on mountain bikes and kids' bikes
- Supports crank and rear-wheel assemblies across different models
- Budget-friendly option for bike repair and upkeep