Four Pack 40mm Ball Bearing Cage Kit for Bicycle Crank and Wheel Bearings, Steel Retainer With 20 Balls, Durable Bike Bearing Set for Smooth Rolling and Easy Rebuild, Fits 33.5mm Inner Diameter

Four-Pack 40mm Steel Ball Bearing Cage Kit for Bikes
✔️ Includes 4 x 40mm OD, 33.5mm ID steel cages with 20 balls

This four-pack of steel bicycle ball bearing cages with a 20-ball retainer is designed to replace crank bearings and support wheel bearings on many bikes, including street, mountain, lowrider, and stretch models.

✅ Outer diameter 40 mm (1.57"), inner diameter 33.5 mm (1.32"), steel retainer with 20 balls
✅ Pack size: 4 bearings for easy rebuilds
✅ Compatible with 33.5 mm inner diameter head parts; suitable for crank bearings in various bikes
✅ Durable steel construction for smooth rolling on road, MTB, and cruiser bikes

💡 What is a bicycle ball bearing cage used for and why replace crank bearings?

Here's a quick overview of its role in bike maintenance.

- Helps support smooth rotation and keeps bearings properly aligned during rebuilds.
- Made of steel with a 20-ball cage for even load distribution and longer life.
- Fits 33.5 mm inner diameter head parts for common crank setups across many bikes.
- Handy upgrade for crank bearings on road, mountain, cruiser, and stretch bikes.